United States

National Animal Health 

Surveillance System: 2016

Surveillance Activity Report

U.S. Department of 

Agriculture

Animal and Plant Health 

Inspection Service

Veterinary Services

Last updated November 2018
UNITED STATES NATIONAL ANIMAL HEALTH SURVEILLANCE SYSTEM: 2016 SURVEILLANCE ACTIVITY REPORT

USDA-APHIS-VS Page 2 October 2017 (updated 11-30-2018)

Table of Contents

Overview of the U.S. National Animal Health Surveillance System ................................................................................ 4

Selected Active and Passive Surveillance Activities in CY 2016....................................................................................... 5

Avian Influenza (AI) Surveillance ................................................................................................................................. 5

Bovine and Farmed Cervid Surveillance...................................................................................................................... 6

Bluetongue and Epizootic Hemorrhagic Disease (EHD) Surveillance...................................................................... 6

Bovine Spongiform Encephalopathy (BSE) Surveillance.......................................................................................... 6

Brucellosis Surveillance in Cattle and Bison............................................................................................................. 7

Tuberculosis(TB) Surveillance in Cattle and Cervids................................................................................................ 8

Voluntary Chronic Wasting Disease (CWD) Herd Certification Program ................................................................ 8

Cattle Fever Tick Surveillance.................................................................................................................................. 9

Swine Surveillance....................................................................................................................................................... 9

Brucellosis Surveillance in Swine ............................................................................................................................. 9

Classical Swine Fever (CSF) Surveillance................................................................................................................ 10

Influenza A Virus in Swine (IAV-S) Surveillance...................................................................................................... 10

Pseudorabies Virus (PRV) Surveillance .................................................................................................................. 11

Swine Enteric Coronavirus Disease (SECD)............................................................................................................ 12

Feral Swine Surveillance........................................................................................................................................ 12

Equine Surveillance ................................................................................................................................................... 13

Equine Arbovirus Surveillance and Web Reporting .............................................................................................. 13

Equine Piroplasmosis............................................................................................................................................. 15

Equine Infectious Anemia...................................................................................................................................... 16

Ovine and Caprine Surveillance................................................................................................................................. 17

Scrapie Surveillance in Sheep and Goats............................................................................................................... 17

Vesicular Stomatitis Virus Surveillance...................................................................................................................... 18

Traceability ................................................................................................................................................................ 19

One Health Investigations ......................................................................................................................................... 20

The National Animal Health Reporting System (NAHRS) .............................................................................................. 23

U.S. NLRAD Update.................................................................................................................................................... 23

NAHRS Reporting....................................................................................................................................................... 23

Participation .............................................................................................................................................................. 24

Reporting Summary................................................................................................................................................... 25

Bovine............................................................................................................................................................................ 26
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Ovine and Caprine......................................................................................................................................................... 27

Equine............................................................................................................................................................................ 29

Porcine........................................................................................................................................................................... 30

Poultry ........................................................................................................................................................................... 31

Aquaculture................................................................................................................................................................... 33

Farmed Cervids.............................................................................................................................................................. 34

Lagomorph .................................................................................................................................................................... 35

Other OIE Diseases........................................................................................................................................................ 35

Bee Diseases (OIE-Listed) - Optional Reporting ............................................................................................................ 35

FAD Surveillance and Investigations.............................................................................................................................. 36

OIE Reportable Disease Events...................................................................................................................................... 37

U.S. Reporting to the OIE in 2016.............................................................................................................................. 37

U.S. OIE Immediate Notification Disease Events in 2016.......................................................................................... 38

2016 Immediate OIE reports................................................................................................................................. 38

Appendix 1. 2016 U.S. NLRAD-NAHRS Reportable Disease List .................................................................................... 41

Appendix 2. OIE-Reportable Diseases: U.S. Status through CY 2016........................................................................... 49

This report was prepared by USDA-APHIS-VS Center for Epidemiology and Animal Health (CEAH) Surveillance 

Design and Analysis (SDA). For more information, please contact Dr. Celia Antognoli at 

celia.antognoli@aphis.usda.gov or Dr. Stanley Bruntz at Stanley.d.bruntz@aphis.usda.gov

USDA-APHIS-VS-CEAH NRRC

Building B, MS 2E6

2150 Centre Avenue

Fort Collins, CO 80526-8117

970.494.7200

E-mail: NLRAD.NAHRS@aphis.usda.gov

Web site: http://www.aphis.usda.gov/animalhealth/nahrs

Doc # SDA100-101217
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Overview of the U.S. National Animal Health Surveillance System 

This is the annual report of the United States Department of Agriculture (USDA) Animal and Plant Health Inspection 

Service (APHIS) Veterinary Services (VS) National Animal Health Surveillance System (NAHSS) for calendar year 2016. 

The NAHSS is a system created to detect events and trends related to animal health for all stakeholders involved in 

public, animal, and environmental health. VS is implementing a comprehensive and integrated surveillance (CIS) 

approach within the NAHSS to provide a dynamic knowledge base for actions designed to improve animal health, 

productivity, marketability, and product safety in an efficient and integrated way. The NAHSS is an interdisciplinary 

network of partners working together to protect animal health and promote free trade through surveillance, 

control, and prevention of foreign, emerging, zoonotic, and endemic diseases. The NAHSS infrastructure also 

provides the tools necessary to detect chemical or environmental agents that could affect animal health.

The NAHSS has multiple functioning elements that include field operational resources; a veterinary diagnostic 

laboratory network, including the National Animal Health Laboratory Network (NAHLN); well-developed data and 

sample collection resources; a data storage and management system; and analytic and reporting tools with the 

expertise to convert raw data into information for decision-making. NAHSS includes passive and active surveillance 

for reportable diseases, including those reported to the World Organization for Animal Health (OIE) as well as those 

diseases covered by federally funded surveillance programs. In addition, the surveillance system includes 

monitoring for diseases that States are not mandated to report. 

The National Animal Health Reporting System (NAHRS) is an important component of the NAHSS. The NAHRS 

program is designed to provide summary-level data on the presence of diseases on the National List of Reportable 

Animal Diseases (NLRAD) in the United States. NAHRS gathers monthly data from participating State animal health 

officials (SAHOs) on the presence of NLRAD-listed diseases, identified with a high level of certainty (See Appendix 1.)

NAHRS plays an important role in U.S. reporting of notifiable diseases to the OIE. For more than 30 years, VS has

reported occurrences of OIE-notifiable diseases to the OIE. The United States meets its OIE reporting obligations

using a variety of sources including NAHRS reporting, foreign animal disease (FAD) reports, national program disease

surveillance reports, and others.

This annual report includes a summary of selected federally supported active and passive surveillance activities in 

calendar year 2016, as well as a summary of NAHRS reporting by participating States. This document also includes 

an overview of the OIE and U.S. reporting to the OIE in 2016. In addition, we include the 2016 NLRAD-NAHRS 

Reportable Disease List (Appendix 1) as well as the U.S. status of OIE-listed diseases for CY 2016 (Appendix 2.)
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Selected Active and Passive Surveillance Activities in CY 2016

The following selected reports are summarized from various surveillance programs and activities conducted by 

APHIS and partners during 2016. This is not a complete list of the surveillance activities conducted. In most cases, 

we indicate whether the surveillance data reflects fiscal year 2016 (Oct. 1, 2015, through Sept. 30, 2016) or 

calendar year 2016 (Jan. 1 through Dec. 31, 2016) activities.

The CIS approach is a natural progression from historical disease eradication programs to a flexible, responsive, 

and cost-efficient surveillance system. This approach is not based on specific diseases, but rather is designed 

around the fundamental components of surveillance. CIS can be adapted to all species as well as the evolving 

animal health issues that APHIS-VS, States, and animal industries face. These include diseases not currently 

present in the United States, zoonotic diseases of public health concern, emerging diseases that threaten our 

industries and economy, diseases that are introduced with malicious intent, and selected endemic disease 

conditions of high economic impact.

Avian Influenza (AI) Surveillance

APHIS’ AI surveillance program addresses the following poultry populations:

• Large-volume commercial poultry industry

• Small-volume, high-value commercial poultry industry

• Live-bird marketing system (LBMS)

• Backyard flocks

The program also includes non-poultry avian populations, including wild, migratory birds, and zoo or exhibition 

birds.

Commercial Poultry – Surveillance for AI in commercial poultry is described under provisions of the National H5 and 

H7 Low Pathogenicity Avian Influenza (LPAI) Control Program of the National Poultry Improvement Plan (NPIP), 

which was implemented in September 2006. Forty-nine States, one U.S. Territory, and 112,119 flocks participated in 

NPIP AI surveillance in FY 2016, conducting a total of 3,051,068 tests for AI. Testing is conducted by approved 

laboratories at the State level and non-negative samples are forwarded to VS’ National Veterinary Services 

Laboratories (NVSL) for confirmation. For 2016, NVSL received 1,670 specimens from 19 States (Alabama, Arkansas, 

California, Delaware, Iowa, Illinois, Indiana, Kentucky, Maryland, Michigan, Minnesota, Missouri, North Carolina, 

Nebraska, New Hampshire, Pennsylvania, South Dakota, Virginia, and Wisconsin.) There were two H5/H7 events in 

commercial poultry during 2016 caused by North American lineage viruses infecting turkeys: January 2016 H7N8 

LPAI (eight premises) and HPAI (one premises) in Indiana turkeys – molecular and epidemiologic data suggest a 

single introduction with limited lateral spread, and mutation to HPAI in a single flock likely affected during lateral 

spread; and April 2016 H5N1 LPAI in Missouri turkeys representing a single introduction with no further spread. 

Swine lineage IAV H1/H3 was isolated from in turkeys in seven States (Illinois, Indiana, Michigan, Minnesota, 

Missouri, North Carolina, and South Dakota); H1N1pdm09 was detected in four States (Indiana, Michigan, 

Minnesota, and Missouri.)

Live Bird Marketing System (LBMS), Upland Game, Backyard Birds and Exhibition Birds – The uniform standards 

for testing in the live bird marketing system were implemented as a State-Federal-industry cooperative program in 

2004 for the prevention and control of H5 and H7. Nearly 100,000 tests for avian influenza were performed from 

birds in 37 States during FY 2016. Testing is conducted by approved laboratories at the State level and non-negative 

samples are forwarded to NVSL for confirmation. For 2016, NVSL received 1,664 specimens from 22 States 

(California, Connecticut, Florida, Georgia, Idaho, Indiana, Kansas, Kentucky, Massachusetts, Maryland, Maine, 

Minnesota, Missouri, North Carolina, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, 

Tennessee, Texas, and Virginia.) For H5/H7 events, H5N2 LPAI of North American lineage (based upon sequence) 
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was detected in live bird markets in New Jersey, New York, and Pennsylvania; the event was traced to a source flock 

that supplied a single distributor in New York. An H2N2 virus first detected in late 2014 continues to circulate in 

northeastern LBMs and at least one market was positive for the H5N2 LPAI and H2N2 concurrently. While the H5N2 

LPAI was predominantly isolated from the source Muscovy duck flock, the potential impact of a reassortment event 

is greater where a more poultry-adapted virus, such as this H2N2, is circulating at the same time. Also, H1N1 (avian 

lineage) was detected from ducks in New Jersey and Pennsylvania. For antibody detections in 2016, H7N3 antibody 

was detected in a Massachusetts backyard flock and H9N2 antibody in Iowa game pheasants; both premises tested 

negative for virus. 

Wild Birds – In July 2015, State and Federal agencies initiated a national wild bird surveillance effort to provide 

information to guide management actions addressing some of the issues associated with HPAI virus in birds. This 

includes risks to commercial poultry, backyard poultry, game bird farms, wild birds, wild bird rehabilitation facilities, 

falconry birds, and captive bird collections in zoos/aviaries. Specific objectives of the plan were to: 1) determine the 

distribution of influenza viruses of interest in the U.S.; 2) detect spread of influenzas of interest to new areas of 

concern; and 3) provide a flexible surveillance framework that can be modified to monitor wild waterfowl 

populations for avian influenza, detect reassortant avian influenza viruses, and estimate apparent prevalence of 

important influenzas once detected in an area of concern. In FY 2016, a total of 45,088 wild bird samples were 

collected and tested for avian influenza. Of these, there was one Eurasian origin H5 PCR-only detection (no viable 

virus, sequencing unsuccessful) from a hunter-harvested mallard in Oregon in November 2015, and one confirmed 

HPAI Eurasian-North American reassorted H5N2 positive mallard sampled in August 2016 in Fairbanks, AK.

For more information on avian influenza testing in poultry and wild birds, see the proceedings of the 2016 USAHA 

Annual Meeting http://www.usaha.org/upload/Proceedings/2016_Proceedings_FINAL.pdf

Bovine and Farmed Cervid Surveillance

Bluetongue and Epizootic Hemorrhagic Disease (EHD) Surveillance

Bluetongue virus (BTV) and epizootic hemorrhagic disease virus (EHDV) are members of the Reoviridae family and 

are transmitted by biting Culicoides midges. Worldwide, 24 bluetongue serotypes have been identified and in the

United States, bluetongue virus types 2, 10, 11, 13, and 17 are considered endemic. Of the endemic types, BTV-2 is

restricted primarily to Florida and the other types are more widespread. In recent years, NVSL has identified 10

previously unrecognized bluetongue serotypes from U.S. ruminant species (BTV types 1, 3, 5, 6, 9, 12, 14, 19, 22, 24).

None of the non-endemic bluetongue types has caused widespread disease outbreaks. The types of Culicoides spp. 

vectors responsible for transmission of the non-endemic types are unknown.

In the United States, EHD is one of the most significant infectious diseases of white-tailed deer, whereas infection in 

cattle has been primarily subclinical or rarely resulting in mild disease. In recent years, though, there have been 

multiple cases of EHDV causing severe disease in cattle herds and other species.

Summary of BTV isolates identified in 2016 – Bluetongue virus serotypes 1, 2, 3, 17, and 22 were identified in CY

2016. BTV-1 was identified in sheep; BTV-2 was identified in deer; BTV-3 was identified in deer and sheep; BTV-17

was identified in cattle and sheep; and BTV-22 was identified in sheep.

Summary of EHDV isolates identified in 2016 – EHDV-1, EHDV-2, and EHDV-6 viruses were isolated. EHDV-2 was 

the predominate isolate identified. 

Bovine Spongiform Encephalopathy (BSE) Surveillance

In FY 2016, APHIS tested 26,564 samples for BSE under the ongoing surveillance program. Figure 1 summarizes the

U.S. BSE OIE points summary from 2010-2016. The primary purposes of the program are to continue monitoring and 
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assessing changes to the BSE status of U.S. cattle and to provide mechanisms for early detection of BSE. The

program enables USDA to detect BSE at a rate of one infected animal per 1 million adult cattle with a high degree of

confidence. It also maintains surveillance at levels that exceed international standards, emphasizes sample

collection from cattle subpopulations where BSE is most likely to be detected, and retains sample collections from

all important surveillance sources. Currently, the OIE categorizes countries as either negligible risk, controlled risk,

or undetermined risk for BSE. For live cattle and for many products derived from cattle, the trade conditions

recommended by the OIE guidelines are based on the BSE risk classification of the exporting country. In May 2013,

the OIE upgraded the BSE status of the United States from BSE controlled-risk status to BSE negligible-risk status. 

This upgrade provides the U.S. cattle industry a major economic benefit via greater access to international markets. 

The BSE status upgrade also decreased the level of surveillance required by the OIE from Type A to Type B 

surveillance.

Other notable changes to the BSE program occurred in 2015 and 2016. Beginning in FY 2015, USDA discontinued 

testing of any animals under 12 months of age. In FY 2016, the BSE surveillance program reduced the targeted 

number of samples collected from approximately 40,000 to 25,000. Even with the large sample reduction, the OIE 

point goals of the surveillance program were still easily met. 

Figure 1. Comparison of the number of BSE OIE points accumulated by the U.S. to the number of OIE points 

required for OIE Type A and Type B surveillance, 2010-2016

* OIE Type A Surveillance requires 300,000 points over a 7-year period (42,857 points/yr.) with surveillance designed to detect prevalence of 1 infected animal

per 100,000 adult cattle at a 95 percent confidence level. OIE Type B Surveillance requires 150,000 points over a 7-year period (21,429 points/yr.) with 

surveillance designed to detect prevalence of 1 infected animal per 50,000 adult cattle at a 95 percent confidence level. As Figure 2 shows, U.S. surveillance –

designed to detect BSE at a rate of 1 infected animal per 1 million adult cattle with a high degree of confidence – far exceedsinternational standards. See OIE 

Terrestrial Animal Health Code, Article 11.4.22 for more information.

Brucellosis Surveillance in Cattle and Bison

The U.S. Cooperative State-Federal Brucellosis program has been highly successful in eradicating bovine brucellosis 

from our domestic cattle and bison herds. All 50 States have been Class Free for bovine brucellosis since July 2009,

despite recent detections in the Greater Yellowstone Area (GYA) States of Idaho, Montana, and Wyoming. The GYA 

remains our primary focus for brucellosis in livestock because the disease is endemic in GYA wild elk and bison.

In FY 2016, brucellosis was newly detected in two cattle herds, and one privately owned bison herd remained 

affected in the GYA States. All three of the herds are located within their respective State’s designated surveillance 

0

200,000

400,000

600,000

800,000

1,000,000

1,200,000

1,400,000

1,600,000

2007 2008 2009 2010 2011 2012 2013 2014 2015 2016

OIE Points

U.S. OIE Points OIE Type A Surveillance* OIE Type B Surveillance*
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area (DSA). One of the cattle herds has successfully completed all required testing and was released from 

quarantine; the other two herds remain under quarantine with herd management plans, including movement 

controls and additional herd testing. APHIS-VS continues a national bovine brucellosis slaughter surveillance plan 

designed to detect brucellosis infection with 95 percent confidence that the prevalence level of brucellosis does not 

exceed 1 infected animal per 100,000 animals. This level is higher than required by OIE standards. In FY 2016, 

APHIS-VS tested approximately 1.9 million head of cattle under the Market Cattle Identification (MCI) slaughter 

surveillance program and an additional 97,000 head of cattle at livestock markets. Approximately 148 epidemiologic 

investigations were conducted on suspicious MCI surveillance tests. An additional 250,000 head of cattle and 

domestic bison were tested on farms or ranches. These tests were conducted primarily for movement and private 

sales, epidemiologic investigations, herd certification, or show or exhibition purposes. In FY 2016, approximately 1.9 

million calves and approximately 262,296 adult cattle were vaccinated for brucellosis and approximately 276 herds 

were certified as brucellosis certified-free cattle herds.

Tuberculosis(TB) Surveillance in Cattle and Cervids

Five TB-affected beef herds were detected during FY 2016. Four herds were located in Michigan and one in 

Indiana. Two of the TB-affected herds were detected as a result of area surveillance, one herd was detected 

through epidemiological investigation, one herd was detected through slaughter surveillance, and one herd was 

detected through movement testing. An affected dairy complex detected in 2015 via slaughter surveillance 

continued a test-and-remove program for elimination of TB in the herd. In addition to cattle surveillance, 10,750 

cervids were serologically tested and 2,095 were skin tested for TB in FY 2016. There were no positives confirmed for 

Mycobacterium bovis in those animals.

For FY 2016, a total of 6,389 granulomas were identified from 153 federally inspected establishments. The minimum 

standard for slaughter surveillance is one granuloma submitted per 2,000 adult cattle slaughtered annually. Of 

these, a total of 14 had histology compatible with mycobacteriosis, (0.023 percent). M. bovis was confirmed in ten 

(71.4 percent) of these cases. TB is confirmed by polymerase chain reaction (PCR) testing of formalin-fixed and 

direct PCR and culture of fresh tissue. Of the remaining four histology compatible cases, M. avium was identified in 

two and two were negative on PCR. One of the ten confirmed cases occurred in an adult cow over two years of age 

from Canada, and nine cases occurred in feeder cattle. Of the nine fed cattle cases, five occurred in Mexican-origin 

cattle and four were in domestic origin steers. Six infected steers came through a Pennsylvania slaughter plant in 

one lot and led to the identification of a new Indiana affected beef herd. Two Texas and one Arizona steers were 

found but USDA was not able to find an affected herd of origin for any of those traces. 

Voluntary Chronic Wasting Disease (CWD) Herd Certification Program

The APHIS-VS National CWD Herd Certification Program (HCP) was implemented in 2014. It is a voluntary FederalState-industry cooperative program administered by APHIS and implemented by participating States. The program 

provides uniform national herd certification standards that minimize the risk of spreading CWD in farmed cervid 

populations. Participating States and herd owners must comply with requirements for animal identification, fencing, 

recordkeeping, inspections/inventories, as well as animal mortality testing and response to any CWD-exposed, 

suspect, and positive herds. APHIS-VS monitors the approved State HCPs to ensure consistency with Federal 

standards through annual reporting by the States.

With each year of surveillance without disease detection, herds participating in the HCP will advance in status until 

reaching 5 years with no evidence of CWD, at which time herds are certified as being low-risk for CWD. Only captive 

cervids from enrolled herds certified as low-risk for CWD may move interstate. Currently, 29 States participate in 

the voluntary CWD Herd Certification Program and have approved HCPs. FY 2016 marks the fourth year that 

approved States have submitted their CWD HCP annual reports to APHIS-VS. In FY 2016, there were 2,704 enrolled 

cervidae herds: 2,129 deer, 447 elk, and 128 mixed-species herds. Of those, there were 2,331 certified cervidae 
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herds: 1,789 deer, 421 elk, and 121 mixed-species herds. A total of 9,556 captive cervids were tested for CWD as 

part of the voluntary HCP in FY 2016.

Cattle Fever Tick (CFT) Surveillance

The Cattle Fever Tick Eradication Program (CFTEP) was created in 1906 to eliminate bovine babesiosis—a severe 

and often fatal cattle disease—from the U.S. cattle population. The cattle tick (Rhipicephalus annulatus) and the 

tropical cattle tick (R. microplus) are carriers of the protozoan parasites (Babesia bigemina and B. bovis) that cause

babesiosis. These ticks are well established in Mexico. A permanent, 500-mile quarantine zone along the TexasMexico border was created in 1938 to maintain the Nation’s status as free from babesiosis and cattle fever ticks. 

The disease and the ticks were officially eradicated from the continental United States in 1943, with the exception

of a narrow permanent quarantine “buffer” zone in south Texas that follows the Rio Grande River. This zone is also

known as the “systematic quarantine zone” because cattle with ticks on quarantined premises must be

systematically treated every 7 to 14 days for 6 to 9 months.

The CFTEP is a cooperative program between APHIS-VS and the Texas Animal Health Commission (TAHC). The TAHC 

provides support personnel and conducts surveillance in tick-free areas of Texas. APHIS-VS leads the program and 

maintains the permanent quarantine zone through surveillance and tick control activities. USDA’s mounted patrol 

inspectors, known as “tick riders,” patrol designated sections to intercept tick-carrying wildlife and stray and 

smuggled Mexican-origin livestock. Intercepted animals must be quarantined, inspected, and treated.

In FY 2016, APHIS-VS conducted 16,657 inspections of individual premises for ticks, including 5,142 river trail 

patrols. Also in FY 2016, APHIS-VS identified 42 newly infested premises inside the buffer zone, 13 more than in FY 

2015. There were 44 newly affected premises at the end of FY 2016 outside the border – 16 more than in FY 

2015. In addition, 33 of 60 stray cattle captured along the border were infested with CFT, and 8 of the 30 stray 

horses/mules were infested. 

A defined quarantine area that includes affected premises is established when infected premises are identified. To 

release a quarantine area, every infested premises must have all cattle treated for at least 9 months, including 

inspections and treatments every 2 weeks. As a result, APHIS-VS conducted 124,112 individual animal inspections 

and 51,940 treatments throughout South Texas. In FY 2016, the quarantine buffer zone and the free area of Texas 

contained 86 newly quarantined premises, compared to 57 in FY 2015. 

In October 2014, the TAHC and the USDA confirmed the presence of CFT on Cameron County, TX, premises located 

outside of the permanent quarantine zone. To protect the land, premises, and animals from exposure to CFT, the 

TAHC created a temporary preventative quarantine area (TPQA) in Cameron County. Surveillance efforts have been 

ongoing since the TPQA went into effect. The TPQA originally started with six new premises located outside the 

permanent quarantine zone. In FY 2016, there were 17 infested premises identified in the TPQA, consisting of 

approximately 223,000 acres. In addition, APHIS is working with the TAHC, the USDA Agricultural Research Service 

(ARS), and a major veterinary pharmaceutical company to evaluate an anti-tick vaccine for cattle within the 

permanent quarantine buffer zone in South Texas, with plans to expand to a larger population. 

Swine Surveillance

Brucellosis Surveillance in Swine

In FY 2016, all 50 States and U.S. territories maintained their free status for swine brucellosis, as defined by the 

Swine Brucellosis Control and Eradication Program 

(http://www.aphis.usda.gov/animal_health/animal_dis_spec/swine/downloads/sbruumr.pdf). The Kentucky Federal 

Brucellosis Laboratory tested 169,071 cull sow/boar slaughter samples and 2,981 feral swine samples for swine 

brucellosis surveillance. In FY 2016, no commercial production swine herds were found to be infected with swine

brucellosis; however, feral swine remain a reservoir of brucellosis and brucellosis continues to be identified in non-
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biosecure herds with exposure to feral swine. Biosecurity measures remain vital in preventing or minimizing 

contact with feral swine.

Classical Swine Fever (CSF) Surveillance

In FY 2016, 18 approved NAHLN laboratories and the NVSL Foreign Animal Disease Diagnostic Laboratory

conducted CSF surveillance testing on a total of 12,705 specimens. All surveillance specimens were confirmed

negative. VS conducted 30 swine FAD investigations for suspected CSF and all were confirmed as negative after 

testing. Table 1 lists the number of tested animals and surveillance streams for CSF testing in FY 2016. Additional 

information about the CSF surveillance program is available on the APHIS Web site at 

https://www.aphis.usda.gov/aphis/ourfocus/animalhealth/animal-disease-information/swine-diseaseinformation/ct_classical_swine_fever_surveillance

Table 1. Number of animals tested under the national CSF surveillance plan for FY 2016

Surveillance Stream

Number of Tested 

Animals

Sick pig specimenssubmitted to veterinary diagnostic laboratories 3,284

Slaughter swine with high probability of CSF exposure 1,629

Feral swine 2,990

Swine with high probability of CSF exposure 1 4,717

Swine with low probability of CSF exposure2 ...

FAD submissionstested for CSF 30

1Waste feeders and populations from States with high probability of CSF exposure

2 Populations from States with low probability of CSF exposure

Influenza A Virus in Swine (IAV-S) Surveillance

USDA-APHIS-VS completed almost 8 years of cooperative IAV surveillance in 2016. The number of voluntary 

submissions to this program increased consistently from 2011 to 2016 as the industry gained confidence in the 

anonymous nature of the surveillance. The objectives of the surveillance program continue to be: (1) monitoring the

genetic evolution of swine influenza viruses, (2) identifying and providing influenza virus isolates for research and to 

establish an objective database for genetic analysis of the isolates, and (3) the selection of isolates for development

of relevant diagnostic reagents, updating diagnostic assays, and vaccine seed stock products. VS’ swine IAV 

surveillance activities are providing valuable sequencing information. The sequencing results from program isolates 

are being submitted into GenBank, ® the National Institutes of Health genetic sequence database that is publically 

available. This data can yield information needed for vaccine and diagnostics decision-making and contributes to the 

analysis for possible zoonotic threats.

In FY 2016, APHIS-VS implemented four modifications to enhance the efficiency and cost-effectiveness of the 

surveillance. Because of the modifications listed below, the number of accessions decreased, but the number of 

viruses submitted to the program remained relatively constant. Modifications included:

1. Sample screening costs for the Matrix PCR flowed to the industry.

2. Matrix PCR test CT cutoff values lowered for samples to be accepted into USDA-funded further testing.

3. The M gene would be monitored through NVSL whole genome sequencing while payment to NAHLN labs 

for M gene sequencing was discontinued, and 

4. One sample per accession, rather than two, would move forward for subtyping. 
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In FY 2016, VS tested a total of 123,434 samples from 36,856 accessions into the IAV-S surveillance activities. 

Circulating subtypes identified through swine IAV surveillance in FY 2016 included H1N1, H1N2, and H3N2. The 

predominant subtypes were H1N1 and H1N2. The dominant HA and NA constellations detected in FY16 were delta1 

H1N2-2002, gamma H1N1-classical, Cluster IV-A H3N2-2002, and delta2 H1N2-1998 (Figure 2). Out of the M genes 

sequenced (n = 785), 781 were pandemic-lineage while four were trig-lineage. The emerging human-like H3N2 was 

detected with increased frequency (7.32 percent in FY 2016 compared with 2.11 percent in FY 2015). 

 

Figure 2. Percentage of HA and NA combinations, FY 2016

IAV-S surveillance reports are now posted on the APHIS web site at 

https://www.aphis.usda.gov/aphis/ourfocus/animalhealth/animal-disease-information/swine-diseaseinformation/ct_swine_health_monitoring_surveillance

Pseudorabies Virus (PRV) Surveillance

FY 2016 was the seventh full year of national PRV surveillance. Ten NAHLN laboratories, USDA’s Federal laboratory

in Kentucky, and NVSL conducted the PRV surveillance testing on a total of 200,383 samples. NVSL performed 

confirmatory testing on any non-negative test and positive assay results were reported to SAHOs for investigation. 

No commercial herds were found to be positive for PRV in FY 2016. Table 2 lists the number of swine tested for PRV 

from the various surveillance streams or populations from FY 2014 through 2016. Additional information about the

PRV surveillance program is available on the APHIS Web site at 

https://www.aphis.usda.gov/aphis/ourfocus/animalhealth/animal-disease-information/swine-disease-information

H1.alpha

H1.beta

H1.delta1

H1.delta2

H1.gamma

H1.pandemic

H3.Human_H3

H3.IV

H3.IV?A

H3.IV?B

H3.IV?E

N1.Classical N1.Pandemic N2.1998 N2.2002

NA type

HAt ype

0

10

20

percent

Percentage of HA and NA combinations - Oct 2015 to Sept 2016
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Table 2. Number of swine tested in each PRV targeted surveillance population in FY 2014, FY 2015, and FY 2016

Surveillance stream / Targeted population

Number of 

swine tested 

FY 2014

Number of 

swine tested 

FY 2015

Number of 

swine tested 

FY 2016

Diagnostic laboratory serologic submissions:

Sick pig submissions 222 595 231

Routine serology/herd profiling 24,522 22,267 18,848

Swine with high probability of feral swine exposure 6,771 4,208 5,882

Swine with known feral swine exposure 904 591 620

Total – Diagnostic laboratory serologic submissions 16,958* 32,426a 27,679b

Cull sow-boars at slaughter 278,022 234,915 210,643

Market swine at slaughter 13,318 9,311 7,228

Feral swine 2,798 3,063 2,986

Swine cases highly suspicious for PRV 0 0 0

TOTAL 279,450* 248,613 200,383

* Four samples were tested in FY 2014 as epidemiologic traceback samples.

Swine Enteric Coronavirus Disease (SECD)

SECD is a collection of coronaviruses first identified in the United States in 2013. Porcine epidemic diarrhea virus 

(PEDv) appeared in the United States in April 2013. Since that time, PEDv has spread widely within the U.S. swine 

industry. In early 2014, an additional related virus, porcine delta coronavirus (PDCoV), appeared in this country. 

Infections with these novel SECD viruses can cause significant morbidity and mortality, particularly in young piglets. 

In response to the large number of SECD cases that were causing significant hardship for the U.S. swine industry, 

USDA issued a Federal Order in June 2014, making SECD a reportable disease. At the same time, USDA made funds 

available to cover specific costs associated with the disease. A revised Federal Order was issued on January 4, 2016, 

to more effectively use remaining emergency funding. In FY 2016, SECD remained a reportable disease, which 

means that producers, veterinarians, and diagnostic laboratories are required to report all cases of SECD to USDA or 

State animal health officials (SAHOs). The reporting criteria are unchanged in the revised Federal Order. Of the 

SECD laboratory accessions reported, 3,747 out of 32,344 were positive for PEDv and 476 out of 24,412 were 

positive for PDCoV during FY 2016. APHIS-VS has generated weekly situation reports since July 31, 2014. These 

weekly reports and additional information about SECD can be found at http://www.aphis.usda.gov/animalhealth/secd

Feral Swine Surveillance

Feral swine (Sus scrofa) are a harmful and destructive invasive species. Their geographic range and population 

numbers are increasing in the United States. Though exotic to North America, feral swine have become widely 

distributed through accidental releases of domesticated pigs and Eurasian wild boars that escape from shooter 

operations or alleged illegal transport and release of feral swine between States for hunting.

Nationwide, feral swine cause an estimated $1.5 billion in property and agricultural damage annually, and this 

number is growing. These wild pigs destroy crops and erode soils through their rooting, wallowing, and 

consumption activities. Feral swine also prey on native mammals, young domestic livestock, and birds. Feral swine 

compete with wildlife and livestock for food and contaminate fields and streams with E. coli and other bacteria. 
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They also carry more than 30 bacterial and viral pathogens in addition to numerous parasites that can affect 

people, pets, other farm animals, and wildlife. Because feral swine are susceptible to several foreign animal 

diseases, they could play a key role in spreading these diseases should they enter the United States.

Currently, feral swine have been reported or are believed to exist in at least 38 States as well as in parts of Canada 

and Mexico. The estimated feral pig population in the United States is more than 5 million and is rapidly 

expanding. Range expansion over the last few decades is due to a variety of factors including their adaptability to a 

variety of climates and conditions, translocation by humans, and a lack of natural predators. Additional 

information on the location of feral swine in the United States can be found at the Southeastern Cooperative 

Wildlife Disease Study (SCWDS) website: http://swine.vet.uga.edu/nfsms/information/map2016.htm

In 2014, in response to the increasing damage and disease threats posed by expanding feral swine populations in 

the United States, Congress appropriated money to USDA-APHIS for a collaborative, national feral swine damage 

management program. The overarching goal of the APHIS National Feral Swine Damage Management Program is 

to protect agricultural and natural resources, property, animal health, and human health and safety by managing 

damage caused by feral swine in the United States and its territories. Additional information about this program 

can be found here: https://www.aphis.usda.gov/aphis/ourfocus/wildlifedamage/operational-activities/feralswine/feral-swine-program 

As part of the Feral Swine Damage Management Program, USDA-APHIS Wildlife Services, in collaboration with 

APHIS-VS, annually samples feral pigs in the United States for several diseases. In CY 2016, APHIS-Wildlife Services 

tested 2,990 feral swine samples from 33 States for CSF, 2,986 feral swine samples from 32 States for PRV, and 

2,981 samples from 32 States for swine brucellosis. None of the sampled pigs were positive for CSF. However, 19.0 

percent of the pigs tested positive for pseudorabies exposure and 5.5 percent for swine brucellosis exposure.

Equine Surveillance

Equine Arbovirus (West Nile Virus, Eastern and Western Equine Encephalitis) Surveillance and Web Reporting

APHIS publishes biweekly updates on the number of equine cases of West Nile virus (WNV) and eastern and western 

equine encephalitis (EEE and WEE) during the arbovirus transmission season, which runs approximately from June

through November. Equine arbovirus case reporting is carried out through collaboration with the Centers for

Disease Control and Prevention (CDC) and State veterinary and public health officials. CDC provides arbovirus case

information through its ArboNET reporting system, an electronic surveillance and reporting system used to track and 

report arboviral activity. Biweekly updates and veterinary case definitions for WNV and EEE/WEE are published

online at http://www.aphis.usda.gov/animal-health/equine-health

West Nile Virus – In CY 2016, 33 U.S. States reported 380 equine cases of WNV. The 380 reported equine cases of 

WNV are the highest since 2012 (Figure 3). The most cases were reported by Texas (136), Washington (27), and 

California (21). Figure 4 shows the distribution of cases among the States.
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Figure 3. Reported U.S. equine cases of West Nile virus, 2003-2016

Figure 4. Distribution of reported equine WNV cases in 2016 (380 total cases)
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Eastern Equine Encephalitis – In CY 2016, 15 U.S. States reported 118 equine cases of EEE. This was higher than 70

reported cases in 2015 (Figure 5). Florida reported the most cases with 24, followed by Wisconsin (19) and South 

Carolina (15). Figure 6 shows the distribution of cases among the States.

Figure 5. Reported U.S. equine cases of eastern equine encephalitis, 2003-2016

Figure 6. Distribution of reported equine EEE cases in 2016 (118 total cases) 
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Equine Piroplasmosis

Since November 2009, more than 320,000 domestic U.S. horses have been tested for equine piroplasmosis (EP) 

through active surveillance and movement testing. To date, 342 EP-positive horses (332 Theileria equi-positive, 10 

Babesia caballi-positive) have been identified through this surveillance. These positive horses are unrelated to the 

2009-2010 T.equi outbreak on a Texas ranch where 413 positive horses were identified in connection with the 

outbreak and natural tick-borne transmission on the ranch was documented to have occurred over at least 20 years 

and has since been eradicated. Of the 342 positive horses identified through active surveillance, 289 were Quarter 

Horse racehorses, 14 were Thoroughbred racehorses, and 33 were horses previously imported to the United States 

before August 2005 under the complement fixation test. The epidemiology investigations conducted in all of these 

cases have indicated no evidence of tick-borne transmission and the cases in racehorses specifically have involved 

iatrogenic transmission as the method of spread. 

In FY 2016, a total of 22,192 domestic U.S. horses were tested for EP, with the identification of 76 horses positive 

for T. equi. Seventy-four were Quarter Horse racehorses, one was a Thoroughbred racehorse participating in 

unsanctioned racing, and one horse was an Azteca mare suspected to have been illegally moved from Mexico. The 

Quarter Horse racehorses were participating in sanctioned racing, unsanctioned racing, or both, and three of these 

horses were found to be dually infected with both T. equi and equine infectious anemia (EIA). The majority of 

these horses were found as clusters of positives associated with the same trainer and/or owner and epidemiology 

investigations conducted have implicated iatrogenic transmission (needle/syringe/IV equipment reuse, blood 

transfusions, contamination of multi-use drug vials, etc.) as the primary method of transmission in all racehorse 

cases identified in 2016. 

Equine Infectious Anemia

Equine infectious anemia (EIA) regulations vary by State and may include requirements to test for interstate 

movement, upon change of ownership, for entry into events, or for commercially housed horses. In addition to 

State requirements, racing authorities, show venues, stables, and other organizations may also require EIA testing.

Reporting of EIA testing is summarized on a calendar-year basis. During 2016, a total of 1,279,579 EIA tests were 

conducted, resulting in detection of 52 positive horses in 17 States. These results compared to 1,354,454 tests and 

65 positives in 13 States in 2015. Figure 7 presents a summary of EIA testing from 2000-2016. Historical data and 

additional information on EIA are available online at http://www.aphis.usda.gov/animal-health/equine-health .
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Figure 7. Equine infectious anemia test results, United States, 2000-2016

States are encouraged to provide EIA test data to VS through the NAHRS online reporting tool. VS requested EIA 

information by e-mail from States that did not use NAHRS and recorded the data in the NAHRS database.

Ovine and Caprine Surveillance

Scrapie Surveillance in Sheep and Goats

The United States accelerated its efforts to eradicate classical scrapie1 in FY 2002 by adopting regulations requiring 

the official identification of sheep and goats and by implementing Regulatory Scrapie Slaughter Surveillance (RSSS)

in FY 2003. During FY 2016, samples from 37,902 sheep and goats were collected at 179 sites in 39 States as part of

the RSSS program. These samples were tested for scrapie using immunohistochemistry testing procedures on brain

and/or lymph node specimens. These tests identified one case of classical scrapie in a sheep. As of the end of FY 

2016, 520,504 animals have been tested for scrapie through RSSS. The percentage of mature sheep found positive

at slaughter, adjusted for face color, decreased by 99.1 percent between FY 2003 and 2016 (Figure 8).

In addition to slaughter surveillance, field necropsies and live-animal biopsies are conducted for routine surveillance 

and as part of disease investigations or flock cleanup plans, including testing of potentially exposed, exposed, and

suspect animals. In FY 2016, a total of 2,101 sheep and goats were tested as part of field investigations; 15 cases of 

classical scrapie in sheep were identified. 

 1 In 2009, the OIE recognized Nor98-like (atypical) scrapie as a separate disease from classical scrapie that does not meet the OIE criteria as a 

notifiable disease. This determination was made based on differences in epidemiology and laboratory findings (most notably, the lack of

evidence to support transmission under natural conditions and its random widespread occurrence). In line with these findings and the 2009

revisions to the OIE scrapie chapter, the United States no longer depopulates.
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 Figure 8. Classical scrapie cases by fiscal year, 2003 – 2016

Vesicular Stomatitis Virus Surveillance

In affected livestock, vesicular stomatitis virus causes blister-like lesions in the mouth, nostrils, hooves, and 

teats. While vesicular stomatitis can cause economic losses to livestock producers, it is a particularly important 

disease because its outward signs are similar to those of foot-and-mouth disease (FMD), an FAD of cloven-hoofed 

animals that was eradicated from the United States in 1929. Laboratory testing is required to distinguish these

diseases in cloven-hoofed animals. Historically, outbreaks of vesicular stomatitis in domestic livestock occur in the

Southwest United States during warm months and particularly along waterways. However, outbreaks are sporadic

and relatively unpredictable. There have been eight vesicular stomatitis outbreaks since 2000 and the majority of 

the outbreaks began in May (five), followed by April (two), and August (one). The size of the past eight outbreaks 

varied from four infected animals in one State to over 2,000 infected animals in eight States (figures 9 and 10). 

0

50

100

150

200

250

300

350

400

450

500

Classical Scrapie Cases by Year

Field necropsy

Regulatory live animal

RSSS
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Figure 9. States with reported vesicular stomatitis detections since 2000

Vesicular stomatitis detections most commonly occur in equids and bovids with sporadic detections reported in 

sheep, goats, camelids, and swine. The numbers of equine and bovine vesicular stomatitis detections since 

2000 are shown in Figure 10. 

 Figure 10. Equine and bovine vesicular stomatitis detections reported since 2000

Management and reporting of vesicular stomatitis cases changed in 2015 resulting in estimates only of the 

minimum number of positive animals. No cases of vesicular stomatitis were detected in 2016.

Animal Disease Traceability

On January 11, 2013, USDA published a final rule establishing general regulations for improving the traceability of 

U.S. livestock moving interstate (9 CFR Part 86). Under the final rule (Traceability for Livestock Moving Interstate),

unless specifically exempted, livestock moved interstate must be officially identified and accompanied by an 

interstate certificate of veterinary inspection (ICVI) or other documentation, such as owner-shipper statements or 
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brand certificates. The proposed rule was issued on August 2011 for public comment. Several modifications were 

made to the final rule after USDA reviewed and considered the comments. These modifications include: 

• Accepting the use of brands, tattoos, and brand registration as official identification when accepted by the 

shipping and receiving States or Tribes 

• Permanently maintaining the use of back tags as an alternative to official ear tags for cattle and bison 

moved directly to slaughter 

• Accepting movement documentation other than an ICVI for all ages and classes of cattle when accepted by 

the shipping and receiving States or Tribes 

• Clarifying that all livestock moved interstate to a custom slaughter facility are exempt from the regulations 

• Exempting chicks moved interstate from a hatchery from the official identification requirements 

• Exempting beef cattle under 18 months of age from the official identification requirements in this rule, 

unless they are moved interstate for shows, exhibitions, rodeos, or recreational events. The specific 

traceability requirements for this group will be addressed in separate rulemaking, allowing APHIS-VS to 

work closely with industry to ensure the effective implementation of the identification requirements. 

Animal disease traceability (ADT), or knowing where diseased and at-risk animals are, where they've been, and 

when, is very important to ensure a rapid response when animal disease events take place. An efficient and 

accurate animal disease traceability system helps reduce the number of animals involved in an investigation and the 

time needed to respond, and decreases the cost to producers and the government. The ADT framework was 

established to improve the ability to trace animals back from slaughter and forward from premises where animals 

are officially identified in addition to tracing animals’ interstate movements. While APHIS-VS focuses on interstate 

movements of livestock, States and Tribal Nations are responsible for the traceability of livestock within their 

jurisdictions. This approach was designed to embrace the strengths and expertise of States, Tribes, and producers, 

while providing flexibility to use the most effective approaches to identify animals moving interstate nationally.

APHIS-VS established trace performance measures (TPM) to document progress in ADT, and by these measures the 

administration of the ADT program has been successful in the context of the framework of identification and 

movement documentation for covered livestock: specifically, the elapsed times to complete TPMs has decreased 

and percent of traces successfully completed for fiscal year has increased. This is largely attributed to the timely 

retrieval of official identification records (records of tags distributed and tags applied) and movement documents 

through databases for storing the associated information in an easily searchable format. However, while ADT has 

been successful in terms of the intended framework, significant gaps still exist within our tracing capabilities since 

the publication of 9 CFR Part 86. The most significant impediment resulting from the current framework is the 

restriction that the official identification requirement only applies to livestock that move interstate.

APHIS-VS is confident that the basic framework of ADT from the 2013 rule is being successfully implemented and 

believes discussions with industry to consider potential next steps are appropriate. During 2017, the agency

conducted meetings with SAHOs, Federal officials, and the public to gather input on how ADT is working and

identify gaps in the system and next steps. A State-Federal working group is compiling information from the 

outreach meetings to be presented at an animal traceability forum hosted collaboratively by the National Institute 

for Animal Agriculture, United States Animal Health Association, and APHIS in September 2017. 

One Health Investigations

One Health is the concept that the health of animals, the health of people, and the viability of ecosystems are 

linked. This approach brings together the strengths of multiple health science professions including veterinarians, 

physicians, public health professionals, epidemiologists, ecologists, social scientists, toxicologists, and others –
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working locally, nationally, and globally – to attain optimal health for people, domestic animals, wildlife, plants and 

our environment.

APHIS-VS' One Health Coordination Center (OHCC) coordinates and helps implement the One Health aspects of the 

VS mission. In this section, we describe some of the key One Health investigations that APHIS-VS was involved in 

during 2016.

Salmonella heidelberg. Since the beginning of 2016, CDC has reported human cases of Salmonella heidelberg in 

nine States. APHIS-VS has been participating in joint Federal and State calls with animal health and public health

officials about the current outbreak of S.heidelberg associated with dairy bull calves sourced from Wisconsin. 

APHIS-VS partnered with CDC to review the ongoing collaboration between CDC, VS, and Wisconsin State agencies 

in response to this outbreak. Wisconsin Department of Agriculture, Trade, and Consumer Protection (WI DATCP) 

sampled the farms of concern and the livestock market linked to the calves associated with the outbreak. 

Investigation of the outbreak in calves continues. APHIS-VS has provided epidemiology assistance to WI DATCP. CDC 

considers the human outbreak closed; its final web update was posted March 20, 2017, at

https://www.cdc.gov/salmonella/heidelberg-11-16/index.html

Variant influenza virus infections in humans. When an influenza virus that normally circulates in swine, but not 

people, is detected in a person, it is called a “variant influenza virus” and are designated with a lower-case “v” after 

the subtype (ex: H1N2v). As part of swine IAV surveillance activities, USDA personnel participate in routine monthly 

collaboration calls and joint public health-animal health investigations of CDC-laboratory confirmed human 

infections with variant influenza A viruses. These investigations result in close collaboration among local, State, and 

Federal public and animal health officials. NVSL provides diagnostic support for swine samples collected from 

outbreaks. Virus characterization data is shared with State and Federal animal and public health officials, and is also 

deposited in GenBank®, a public access database.

Between March and August 2016, 21 human infections with variant viruses were reported. Three of those infections 

were found to be an H1N2v virus and were primarily linked to exposure on family-owned farms. The remaining 18 

cases were linked to swine exposure at seven different county fairs in Ohio (four) and Michigan (three). Swine were 

sampled at each fair and were found to be positive for an H3N2 virus. Human viruses were found to be genetically 

related to the swine viruses at the fair where the human exposure occurred. 

The National Assembly of State Animal Health Officials and the National Association of State Public Health 

Veterinarians continue to update a set of measures to minimize influenza virus transmission between swine, from 

people to swine, and from swine to people at swine exhibitions. This guidance was updated again in 2016. More 

information is available at http://nasphv.org/Documents/Influenza_Transmission_at_Swine_Exhibitions_2016.pdf

and http://www.cdc.gov/flu/swineflu/index.htm

Human case of swine brucellosis identifies infected swine herds. In March 2016, an individual in New York State 

was diagnosed with Brucella suis infection. The individual was found to be part of a family farming operation that 

raised pasture pork. The pigs on the farm were tested and found to be the source of the infection for the individual. 

State and Federal animal health officials began an investigation and response that lasted for several months. The 

investigation resulted in discovering nine pasture pork farms in four Northeastern States that were infected with 

B.suis, with the strong indication that the infection had been circulating in those pasture pork operations for some 

time prior to its discovery. Tracing of swine movements into and out of the nine farms involved 52 other porkraising facilities in 13 States to ensure no other premises were infected. All swine from the nine infected premises 

were depopulated and the premises were cleaned, disinfected, and remained fallow for a period of 60-120 days 

before any pigs were permitted to be raised again in the same facility. 
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H7N2 LPAI in cats in New York City animal shelters. An outbreak of H7N2 LPAI virus among cats in an animal 

shelter in New York City was first reported on December 9, 2016. This is the first time this strain of influenza has 

been detected in and known to be transmitted among cats. Based on what is known at this time, the risk to humans 

is low. The strain of H7N2 detected is quite similar to the virus that was circulating in the LBMS in New York and 

New Jersey prior to 2006 and which caused an outbreak of LPAI in the Virginia poultry industry in 2002-2003. The 

source of the virus has not yet been determined. Enhanced surveillance in all NYC shelters has not yet been 

implemented. Increased passive surveillance will occur as the result of education of medical professionals and

public health professionals.
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The National Animal Health Reporting System (NAHRS) 

The NAHRS program is designed to provide summary-level data on the presence of National List of Reportable 

Animal Diseases (NLRAD) reportable diseases in the United States. NAHRS gathers monthly data from participating 

SAHOs on the presence of diseases, identified with a high level of certainty, that are included on the NLRAD-NAHRS 

Reportable Disease List (Appendix 1). This list contains all of the OIE-listed diseases. In CY 2013, the NAHRS 

Reportable Disease List cooperatively incorporated all diseases identified on the proposed U.S. NLRAD. The U.S. 

NLRAD is based on OIE-listed reportable diseases and includes other significant diseases identified by commodity 

stakeholders. 

NAHRS is a collaborative effort between participating States, the American Association of Veterinary Laboratory

Diagnosticians (AAVLD), the United States Animal Health Association (USAHA), and the U.S. Department of

Agriculture (USDA) Animal and Plant Health Inspection Service (APHIS). NAHRS functions under the guidance of the 

joint AAVLD-USAHA Animal Health Surveillance and Information Systems Committee—NLRAD-NAHRS 

subcommittee, which includes representatives from the AAVLD, USAHA, USDA-APHIS-Veterinary Services (VS),

participating States, and experts representing the major commodity groups. NAHRS is managed by the VS Center for

Epidemiology and Animal Health’s (CEAH) Surveillance Design and Analysis (SDA) unit.

Objectives of the NAHRS are:

 To demonstrate the integrated and transparent nature of disease surveillance and reporting in the United States

and ultimately help protect the global market share of U.S. animals and animal products sold

 To provide a primary source of information used in the completion of OIE reports by USDA-APHIS-VS

 To provide reporting that reflects the comprehensive summary-level animal disease status of the United States

and individual State reporting that reflects the summary-level disease status in that State

NAHRS reporting system reflects a broad range of animal disease surveillance activities in the United States. 

Information on NAHRS, including the current NLRAD-NAHRS disease list, hard copy of the monthly State report 

form, NAHRS Operational Manual, and additional information for participants, can be found on the NAHRS Web

site: http://www.aphis.usda.gov/animal-health/nahrs. The comprehensive NAHRS Operational Manual and Uniform

Methods and Rules (UM&R) describe disease reporting criteria and participation requirements for member States 

and answers commonly asked questions on NAHRS.

U.S. NLRAD Update

A U.S. NLRAD framework document was completed and posted on the APHIS Web site 

(https://www.aphis.usda.gov/aphis/ourfocus/animalhealth/programoverview/ct_national_list_reportable_animal_diseases) for stakeholder review and comment. The framework 

document describes specifics on NLRAD operations and management. The document was also presented at the 

2016 AAVLD-USAHA meeting in Greensboro, NC. Comments received on the framework document are being used 

to guide the development of the proposed NLRAD rule. 

NAHRS Reporting

Participating SAHOs collect, collate, and report on the occurrence of NAHRS reportable diseases identified with a 

high level of certainty using NAHRS reporting criteria. NAHRS reporting criteria include standards of laboratory

testing and additional criteria outlined in the NAHRS Operational Manual and UM&R. The disease reporting criteria 

are considered minimum guidelines and SAHOs may use additional information to determine whether to report the

presence of disease to the NAHRS (i.e., epidemiological link or other non-listed laboratory tests). The discretion of 

NAHRS reporting by SAHOs is considered essential for valid reporting of disease because disease testing technology
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and other considerations may change rapidly. A designated State official approves the State monthly NAHRS report

and submits it to CEAH through the secure NAHRS online reporting tool.

NAHRS collects data from reporting States on the presence or absence of diseases on the NLRAD-NAHRS Reportable 

Disease List (Appendix 3). A “yes” response from a State indicates that at least one new case of that particular 

disease met the level of certainty for reporting during the specific month; a “no” response indicates that, as far as

SAHOs are aware, no new cases of disease met the level of certainty required to report the disease in the State that

month. Reporting and notification of foreign animal diseases (FADs) and VS program diseases must follow specific

requirements. As with all NAHRS reportable diseases, endemic diseases are reported only when there is a level of

certainty of the disease in a State. A “no” response does not explicitly infer that the endemic disease does not occur 

in the State. CEAH validates NAHRS data against other national reporting systems, including VS program disease 

reports (i.e., brucellosis, pseudorabies, BSE, bovine tuberculosis, scrapie, EIA), ArboNET reporting, other State 

validated information, and OIE immediate reports. The data from these reports are included in the NAHRS annual 

reports for all States. In addition to submitting the monthly report, designated official personnel in participating 

States may use the secure NAHRS online reporting system to view their monthly reports, cumulative summary

reports, national cumulative summary reports, and NAHRS annual reports.

Participation

In 2016, 35 States participated in NAHRS (Figure 11); each participating State contributes one report per month. 

Figure 12 shows the APHIS-VS districts used for reporting NAHRS summary data.

Figure 11. NAHRS 2016 State participants
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Figure 12. APHIS-VS districts used for reporting summary-level NAHRS data

Reporting Summary

The NAHRS Annual Report provides a summary-level overview of NAHRS reporting in 2016. The NAHRS report is

published without identifying the State, owner, or premises where the disease occurred. The following tables

and bullets were used to summarize data reported to NAHRS for each animal species or category:

• Table 1: CY 2016 Summary of Confirmed Positive Monthly State Reports by Species and VS District

• List of Reportable Diseases Not Reported to NAHRS in CY 2016
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Bovine

Table 1. C Y 2016 Summary of Confirmed Positive Monthly State Reports for Bovine Diseases

Disease

# of STATES 

that 

reported the 

disease

# of REPORTS of the Disease

District 1 District 2 District 3 District 4 District 5 District 6

Entire 

U.S.

• Anaplasmosis (Anaplasma marginale, A. 

centrale)

20 27 19 19 32 27 4 128

• Anthrax (Bacillus anthracis) 2 ... ... 1 2 ... ... 3

• Bluetongue 11 2 13 8 12 14 1 50

• Bovine brucellosis (B. abortus) 3 ... 1 ... ... 2 ... 3

• Bovine genital campylobacteriosis 

(Campylobacter fetus venerealis)

5 ... ... 8 ... 6 1 15

• Bovine tuberculosis (Mycobacterium bovis) 4 ... ... 8 2 ... ... 10

• Bovine viral diarrhea (BVD) 20 24 14 49 24 30 19 160

• Brucellosis (B. suis)

1 1 ... 2 .... ... ... ... 2

• Enzootic bovine leukosis (BLV) 22 51 23 57 30 32 24 217

• Epizootic hemorrhagic disease (EHD) 5 ... ... 7 ... 5 2 14

• Infectious bovine rhinotracheitis/infectious 

pustular vulvovaginitis (IBR/IPV)

17 4 12 38 24 2 15 95

• Malignant catarrhal fever (sheep form) 2 ... ... ... ... ... 2 2

• Paratuberculosis (Johne's disease 

Mycobacterium avium paratuberculosis) 27 70 6 80 34 47 27 264

• Q Fever (Coxiella burnetti) 1 ... ... ... 1 2 ... 2

• Rabies 11 14 ... 5 3 3 ... 25

• Trichomoniasis (Tritrichomonas 

[Trichomonas] foetus) 16 ... 12 3 45 15 17 92

1Exposure to feral swine
National Animal Health Reporting System Annual Report for 2016

27

Reportable bovine diseases not reported to NAHRS in 2016:

• Foot-and-mouth disease (FMD)

• Vesicular stomatitis(VS)

• Rinderpest

• Contagious bovine pleuropneumonia (Mycoplasma mycoides mycoides)

• Lumpy skin disease

• Rift Valley fever

• Aujesky's disease (Pseudorabies)

• Echinococcosis/ hydatidosis

• Heartwater (Cowdria ruminantium)

• New World screwworm (Chrysomyia hominivorax)

• Old World screwworm (Chrysomyia bezziana)

• Babesiosis (Babesia bovis, B. bigemina)

• Hemorrhagic septicemia (Pasteurella multocida, serotypes B/Asian or E/African)

• Theileriasis(Theileria annulata, T. parva)

• Trypanosomiasis(Trypanosoma congolense, T. vivax, T. brucei brucei, T. evansi))

• Crimean Congo hemorrhagic fever

• Brucellosis(B. melitensis)

• Akabane

• Bovine spongiform encephalopathy

• Melioidosis (Burkholderia pseudomallei)

Ovine and Caprine

Table 1. CY 2016 Summary of Confirmed Positive Reports for Ovine and Caprine Diseases

Disease

# of 

STATES 

that 

reported 

the disease

# of REPORTS of the Disease

District 1 District 2 District 3 District 4 District 5 District 6 Entire 

U.S.

• Bluetongue 5 ... 3 2 ... ... 5 10

• Caprine 

arthritis/encephalitis (CAE) 16 33 6 45 1 21 8 114

• Enzootic abortion of ewes 

(Ovine psittacosis, 

Chlamydia psittaci)

2 1 ... ... ... ... 4 5

• Maedi-visna / ovine 

progressive pneumonia 8 12 ... 1 ... 8 1 22
National Animal Health Reporting System Annual Report for 2016

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• Ovine epididymitis (Brucella 

ovis) infection 4 ... ... ... ... 12 2 14

• Paratuberculosis (Johne's 

disease - Mycobacterium 

avium paratuberculosis)

19 18 2 24 ... 8 8 60

• Q fever (Coxiella burnetti) 6 2 ... 5 ... 1 5 13

• Rabies 3 8 ... ... ... ... ... 8

• Scrapie 3 ... ... 2 1 ... ... 3

Reportable Ovine and Caprine diseases not reported to NAHRS in CY 2016:

• Foot-and-mouth disease (FMD)

• Vesicular stomatitis(VS)

• Rinderpest

• Peste des petitsruminants

• Rift Valley fever

• Sheep pox and goat pox

• Anthrax

• Aujesky's disease (Pseudorabies)

• Echinococcosis/ hydatidosis

• Heartwater (Cowdria ruminantium)

• New World screwworm (Chrysomyia hominivorax)

• Old World screwworm (Chrysomyia bezziana)

• Bovine tuberculosis (Mycobacterium bovis)

• Theileriasis(Theileria annulata, T. parva)

• Contagious caprine pleuropneumonia (Mycoplasma capricolum capripneumoniae)

• Nairobi sheep disease

• Salmonellosis(Salmonella abortus ovis)

• Tularemia (Francisella tularensis)

• Crimean Congo hemorrhagic fever

• Brucellosis(B. melitensis)

• Akabane

• Bovine brucellosis (B. abortus)

• Contagious agalactia

• West Nile fever

• Meliodosis (Burkholderia pseudomallei)

• Mange (Sarcoptes scabiei var ovis, Chorioptes bovis, Psoroptes ovis, Psoroptes cuniculi, Psorergates ovis)
National Animal Health Reporting System Annual Report for 2016

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Equine

Table 1. C Y 2016 Summary of Confirmed Positive Reports for Equine Diseases

Disease

# of 

STATES 

that 

reported 

the disease

# of REPORTS of the Disease

District 1 District 2 District 3 District 4 District 5 District 6 Entire 

U.S.

• Equine encephalomyelitis 

(Eastern) 15 7 20 4 12 ... ... 43

• Equine herpesvirus 

myeloencephalopathy (EHV1 -

EHM)

12 2 5 3 2 1 6 19

• Equine infectious anemia (EIA) 18 7 3 5 12 2 3 31

• Equine influenza (Virus Type A) 8 4 ... 8 1 1 3 17

• Equine piroplasmosis (Babesiosis, 

Babesia [Piroplasma] equi, B. 

caballi)

6 ... 1 1 5 1 2 10

• Equine rhinopneumonitis (EHV-1) 18 9 3 7 7 1 10 37

• Equine viral arteritis (EVA) 4 ... 2 1 9 1 ... 13

• Rabies 8 2 3 2 2 ... 1 10

• West Nile fever 33 7 3 18 20 10 12 70

Reportable equine diseases not reported to NAHRS in CY 2016:

• African horse sickness

• Anthrax (Bacillus anthracis)

• Echinococcosis/ hydatidosis

• New World screwworm (Chrysomyia hominivorax)

• Old World screwworm (Chrysomyia bezziana)

• Trichinellosis (Trichinella spiralis)

• Contagious equine metritis (Taylorella equigenitalis)

• Dourine (Trypanosoma equiperdum)

• Glanders (Pseudomonas mallei)

• Japanese encephalitis

• Surra (Trypanosoma evansi)

• Venezuelan equine encephalomyelitis

• Vesicular stomatitis (VSV)
National Animal Health Reporting System Annual Report for 2016

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• Tularemia (Francisella tularensis)

• Equine encephalomyelitis(Western)

• Hendra

• Meliodosis (Burkholderia pseudomallei)

Porcine

Table 1. CY 2016 Summary of Confirmed Positive Reports for Porcine Diseases

Disease

# of STATES 

that reported 

the disease

# of REPORTS of Disease

District 1 District 2 District 3 District 4 District 5 District 6 Entire 

U.S.

• Aujesky's disease (Pseudorabies)1 1 ... ... ... 6 ... ... 6

• New World screwworm 

(Cochliomyia hominivorax) 1 ... ... ... 12 ... ... 1

• Porcine reproductive and 

respiratory syndrome (PRRS) 15 10 ... 51 12 24 11 108

• Swine erysipelas (Erysipelothrix 

rhusiopathiae) 1 ... ... 1 ... ... ... 1

• Swine Enteric Coronavirus Disease 

(SECD)(PEDV, PDCoV)3 10 1 ... 39 12 17 2 71

• Transmissible gastroenteritis (TGE) 3 ... ... 3 ... ... ... 3

1Only feral swine and transitional (high-risk) herds reported in 2016; no commercial production swine herds were positive. 2 Pet pig

3 Further information on SECD is included elsewhere in this report in the Swine Surveillance section of the Federally Supported Active and Passive Surveillance Activities in CY 2016 and at the 

following website: http://www.aphis.usda.gov/animal-health/secd

Reportable porcine diseases not reported to NAHRS in CY 2016:

• Foot-and-mouth disease (FMD)

• Vesicular stomatitis(VS)

• Swine vesicular disease

• Rinderpest

• African swine fever

• Classical swine fever (hog cholera)

 
National Animal Health Reporting System Annual Report for 2016

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• Anthrax (Bacillus anthracis)

• Echinococcosis/hydatidosis

• Rabies

• Brucella suis

• Old World screwworm (Chrysomyia bezziana)

• Trichinellosis (Trichinela spiralis)

• Japanese encephalitis

• Cysticercosis (Cysticercus cellulosae metacestode stage of Taenia solium)

• Tularemia (Francisella tularensis)

• Nipah virus encephalitis

• Meliodosis (Burkholderia pseudomallei)

• Vesicular exanthema

Poultry

Table 1. CY 2016 Summary of Confirmed Positive Reports for Poultry Diseases

Disease

# of STATES 

that 

reported 

the disease

# of REPORTS of the Disease

District 1 District 2 District 3 District 4 District 5 District 6 Entire 

U.S.

• Highly pathogenic avian influenza 2 ... ... 1 ... ... 1 2

• Avian chlamydiosis (psittacosis and 

ornithosis, Chlamydia psittaci)1 1 2 ... ... ... ... ... 2

• Avian infectious bronchitis 12 25 21 2 12 ... 12 72

• Avian infectious laryngotracheitis2 11 25 8 6 5 ... 13 57

• Infectious bursal disease (Gumboro 

disease) 3 ... 9 ... ... ... 12 19

• Low pathogenic avian influenza (H5 

or H7) Poultry 

5 7 ... 1 1 1 ... 10

• Mycoplasmosis (M. synoviae) 13 27 23 7 17 ... 21 95

• Mycoplasmosis (Mycoplasma 

gallisepticum) 16 26 18 25 6 1 20 96

• Pullorum disease (Salmonella 

pullorum)3 2 ... ... ... 2 2 ... 3

1 No commercial production flock detections in 2016

2 Includes reports of vaccine-related cases and noncommercial production flocks 3 No commercial production flock detections in 2016
National Animal Health Reporting System Annual Report for 2016

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Reportable poultry diseases not reported to NAHRS in CY 2016:

• Newcastle disease (Exotic)

• Duck viral hepatitis

• Fowl typhoid (Salmonella gallinarum)

• Turkey rhinotracheitis

1 Backyard flocks

2 Includes reports of vaccine-related cases and noncommercial production flocks

 3 Backyard flocks
National Animal Health Reporting System Annual Report for 2016

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Aquaculture

FISH Diseases Reported:

• Viral hemorrhagic septicemia (VHS) was reported by one State in wild shiners

• Infectious salmon anemia (ISA HPR0). One State reported identification of HPR0 on routine testing in healthy fish. The United States reported this identification 

of the ISA HPR0 in healthy fish to the OIE on the July – Dec 6-monthly report.

• Koi herpesvirus disease was reported once each by three States.

• Infectious hematopoietic necrosis (IHN) was reported in wild fish once each by two States.

• Bacterial kidney disease (Renibacterium salmoninarium) was reported one time by a State. 

MOLLUSC Diseases Reported:

• Infection with Perkinsus marinus was reported one time by a State.

• Infection with Xenohaliotis californiensis was reported twice by one State.

• Infection with Haplosporidium nelson or costale (MSX) reported one time by a State.

• Reportable aquaculture diseases not reported to NAHRS in CY 2016:

• Fish: Spring viremia of carp

• Fish: Infectious pancreatic necrosis

• Fish: Epizootic hematopoietic necrosis

• Fish: Infectious salmon anemia

• Fish: Epizootic ulcerative syndrome

• Fish: Gyrodactylosis(Gyrodactylussalaris)

• Fish: Red sea bream iridoviral disease

• Fish: Viral encephalopathy and retinopathy (Viral nervous necrosis)

• Fish: Oncorhynchus masou virus disease

• Fish: Gyrodactylosis (Gyrodactylus salaries)

• Fish: Piscirickettsiosis (Piscirickettsia salmonis)

• Fish: Whirling disease (Myxobolus cerbralis)

• Fish: White sturgeon iridoviral disease

• Fish: Infection with salmonid alphavirus

• Mollusc: Infection with Bonamia ostreae

• Mollusc: Infecton with Bonamia exitiosa

• Mollusc: Infection with Marteilia refringens

• Mollusc: Infection with Perkinsus marinus

• Mollusc: Infection with Perkinsus olseni

• Mollusc: Infection with Xenohaliotis californiensis

• Mollusc: Infection with abalone herpes-like virus

• Crustacean: Taura syndrome

• Crustacean: Yellowhead disease

• Crustacean: Infectious hypodermal and haematopoietic necrosis

• Crustacean: Crayfish plague (Aphanomyces astaci)

• Crustacean: Infectious myonecrosis
National Animal Health Reporting System Annual Report for 2016

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Amphibian Diseases

No domestic-commercial reports through NAHRS reporting for:

• Infection with Batrachochytrium dendrobatidis

• Infection with ranavirus

• Crustacean: White tail disease

• Crustacean: Necrotizing hepatopancreatitis

Farmed Cervids

Table 1. CY 2016 Summary of Confirmed Positive Reports for Farmed Cervids Diseases

Disease

# of STATES 

that 

reported 

the disease

# of REPORTS of the disease 

District 1 District 2 District 3 District 4 District 5 District 6 Entire U.S.

• Anthrax (Bacillus anthracis) 1 ... ... ... 1 ... ... 1

• Bluetongue 3 ... 3 ... 4 ... ... 7

• Chronic wasting disease 4 ... ... 8 5 ... ... 13

• Epizootic hemorrhagic disease 

(EHD)

4 ... 10 2 5 4 ... 21

• Rabies 1 1 ... ... ... ... ... 1

Reportable Farmed Cervid diseases not reported to NAHRS in 2016:

• Foot-and-mouth disease (FMD)

• Vesicular stomatitis(VS)

• Rinderpest

• Akabane

• Rift Valley fever

• Aujesky's disease (pseudorabies)

• Echinococcosis/ hydatidosis

• Heartwater (Cowdria ruminantium)

• New World screwworm (Chrysomyia hominivorax)

• Old World screwworm (Chrysomyia bezziana)

• Paratuberculosis (Johne’s disease)

• Bovine tuberculosis
National Animal Health Reporting System Annual Report for 2016

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• Malignant catarrhal fever

• Crimean Congo hemorrhagic fever

• Brucellosis

• Akabane

• Q Fever (Coxiella burnettii)

• Q Fever 

• Melioidosis (Burkholderia pseudomallei)

Lagomorph • Myxomatosis: One State had two reports of disease

• Tularemia (Francissella tularensis): Three States had four reports of disease

Reportable lagomorph diseases not reported to NAHRS in CY 2016:

• Rabbit hemorrhagic disease

Other OIE Diseases

• Leishmaniosis: Two States had one report each of disease in canines (One imported)

Reportable other diseases not reported to NAHRS in CY 2016:

• Camelpox

Bee Diseases (OIE-Listed) - Optional Reporting

Bee disease reported through NAHRS is optional, as other agencies have primary responsibility for bee diseases. The following bee disease occurrences 

were reported through NAHRS.

• American foulbrood of honey bees

• European foulbrood of honey bees

• Varrosis of honey bees

• Small hive beetle infestation
National Animal Health Reporting System Annual Report for 2016

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FAD Surveillance and Investigations

APHIS-VS conducted 853 FAD investigations in 2016 (Figure 13), resulting in the following detections:

• Highly pathogenic avian influenza (HPAI)

• New World screwworm 

• Foreign ectoparasites (ticks) 

 Figure 13. Number of FAD investigations by year, 1997-2016 

In CY 2016, as in most proceeding years, the majority of FAD investigations were primarily due to vesicular 

complaints (blister-like lesions). Concern about vesicular lesions in ruminants, camelids, captive cervids, and swine

is due to foot-and-mouth disease (FMD), which primarily affects cloven-hoofed domestic and wild animals. None

of the 696 vesicular condition investigations identified in 2016 were positive for FMD. Swine had the most 

vesicular complaints in 2016, primarily due to Senecavirus A. A summary of investigated vesicular complaints is 

included in Table 3 and additional information is available online at 

https://www.aphis.usda.gov/animal_health/emergency_management/downloads/summary_fad_investigations.

pdf

Table 3. Vesicular conditionsin 2016

Species/animal Number of vesicular complaints

Equids(horses, donkeys, and mules) 153

Bovids (cattle, bison) 73

Swine 438

Sheep 9

Goats 19

Cervids 3

Camelids (Bactrian camel) 1

Total 696
National Animal Health Reporting System Annual Report for 2016

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OIE Reportable Disease Events

The need to fight animal diseases at the global level led to the creation of the Office International des Epizooties 

(OIE) established in Paris, France, in 1924 by an international agreement signed by 28 countries. In May 2003, the 

Office became the World Organisation for Animal Health but kept its historical acronym, OIE. 

The OIE is the intergovernmental organization responsible for improving animal health worldwide. The OIE is a 

reference organization of the World Trade Organization (WTO). The United States is a member country of the OIE

and a signatory country of the WTO. Member countries are obligated to comply with the WTO’s Agreement on the

Application of Sanitary and Phytosanitary Measures. The WTO assigned standards-setting authority for international

trade-related animal health issues to the OIE. The United States meets its OIE reporting obligations using a variety of 

sources including NAHRS, FAD reports, national program disease surveillance reports, and others.

OIE member countries are required to comply with OIE notification requirements by reporting on the status of OIE

reportable diseases through the secure, Web-based OIE World Animal Health Information System (WAHIS). 

Notification requirements include:

• A twice-yearly report on the absence or presence and evolution of diseases listed by the OIE and 

information of epidemiological significance to other countries;

• An annual OIE-Food and Agriculture Organization (FAO)-WHO report on any other information of 

significance to other countries, including information from twice-yearly reports, other animal diseases,

zoonoses in humans, animal populations, veterinary services infrastructure, and laboratory tests and

vaccines;

• Immediate notification and follow-up reports for the following events:

o First occurrence of a listed disease and/or infection in a country;

o Reoccurrence of a listed disease and/or infection in a country;

o First occurrence of a new strain of a pathogen of an OIE-listed disease in a country;

o A sudden and unexpected increase in the distribution, incidence, morbidity, or mortality of a listed 

disease prevalent within a country;

o An emerging disease with significant morbidity, mortality, or zoonotic potential;

o Evidence of change in epidemiology of a listed disease, including host range, pathogenicity, and strain,

particularly if there is a zoonotic impact.

Additional information on the OIE, as well as the OIE List of Diseases Reportable, can be found at the OIE website: 

http://www.oie.int/

U.S. Reporting to the OIE in 2016

In the spirit of transparency, the U.S. submitted all required reporting to the OIE in 2016. Reporting included: 

• U.S. Terrestrial and Aquatic January – June 2016 Six-Monthly Report on the Notification of the Presence of 

OIE-Listed Diseases; 

• U.S. Terrestrial and Aquatic July-December 2016 Six-Monthly Report on the Notification of the Presence of 

OIE-Listed Diseases;

• U.S. 2016 Annual OIE-FAO-WHO Animal Health Report; 

• U.S. Annual Reconfirmation of Freedom Documentation (Official Recognition Disease Status) for:

o foot and mouth disease (FMD), 

o African horse sickness (AHS), 

o classical swine fever (CSF), 

o contagious bovine pleuropneumonia (CBPP), 

o pestes des petits ruminants (PPR), 
National Animal Health Reporting System Annual Report for 2016

38

o bovine spongiform encephalopathy (BSE) risk status; and

o required immediate and follow-up U.S. OIE Reports (listed below). 

Current and past submitted U.S. OIE report information, including routine and immediate reports, is available on the

OIE World Animal Health Information (WAHIS) Interface

http://www.oie.int/wahis_2/public/wahid.php/Wahidhome/Home. 

U.S. OIE Immediate Notification Disease Events in 2016

Summary of Reports: In 2016, the United States submitted five OIE immediate reports for animal disease events.

These included two low pathogenic notifiable avian influenza reports; two HPAI reports; and one report on New 

World Screwworm (Cochliomyia hominivorax). Event summaries can be found on the OIE Web site: 

http://web.oie.int/wahis/public.php. Summaries on the Web site are organized by the year of their occurrence.

2016 Immediate OIE reports

Avian Influenza (Infection with Avian Influenza Viruses)

AI is caused by influenza type A viruses that can infect poultry (such as chickens, turkeys, pheasants, quail, domestic 

ducks, geese, and guinea fowl) and are carried by free-flying waterfowl such as ducks, geese, and shorebirds. 

Influenza A viruses are classified by a combination of two groups of proteins: hemagglutinin or “H” proteins, of 

which there are 16 (H1-H16), and neuraminidase or “N” proteins, of which there are nine (N1-N9). Many different 

combinations of “H” and “N” proteins are possible. Each combination is considered a different subtype, and each 

subtype can be further sub-classified as different strains. AI viruses are identified by their pathogenicity (low or 

high)—the ability of a particular virus strain to produce disease in domestic chickens. Any influenza A virus 

(including H5 and H7 avian influenza viruses) in its highly pathogenic form is reportable in birds, but only H5 and H7 

LPAI viral infections in poultry are notifiable as per Chapter 10.4 on avian influenza of the OIE Terrestrial Animal 

Health Code (2016): 

http://www.oie.int/index.php?id=169&L=0&htmfile=chapitre_avian_influenza_viruses.htm

H7N8 HPAI—Indiana 

• OIE Immediate Report January 15, 2016—Resolved April 22, 2016

A turkey flock in Indiana was identified as having high mortality and subsequent testing identified H7N8 HPAI. 

USDA-APHIS, in conjunction with the Indiana State Board of Animal Health, responded to the event. A 

comprehensive epidemiological investigation and enhanced surveillance and testing activities were implemented.

The only positive detection of H7N8 HPAI in poultry was made on January 15, 2016. In addition to having no further 

HPAI detections, the State of Indiana met the following in resolution of the event:

• Mandatory surveillance in the State and control areas was completed with negative results for HPAI. 

• Depopulation of all infected premises was completed and appropriate disposal completed.

• Cleaning and disinfection of the infected premises (including, but not limited to, outside areas, equipment, 

trucks, and other fomites).

• No HPAI detections through wild bird surveillance within 3 months of the event.

H7N8 LPAI—Indiana 

• OIE Immediate Report January 19, 2016—Resolved May 2, 2016

As part of existing avian influenza response plans, USDA-APHIS, in conjunction with the Indiana State Board of 

Animal Health, conducted a comprehensive epidemiological investigation and enhanced surveillance and testing in 

the Indiana H7N8 HPAI control area. Enhanced surveillance in the control area for the H7N8 HPAI Indiana event 

identified H7N8 LPAI in eight turkey flocks. The partial sequences of the H7N8 LPAI and HPAI viruses are nearly 
National Animal Health Reporting System Annual Report for 2016

39

identical except for the HA gene insertion, which imparts high pathogenicity to the HPAI virus. While the detection 

of AI in these additional flocks was of low pathogenicity, and the turkeys in these flocks were clinically healthy, this 

virus has a potential to mutate to HPAI, and, therefore, appropriate sanitary measures were implemented to 

mitigate the risk.

The last positive detection of H7N8 LPAI in poultry was made on January 16, 2016. In addition to having no further 

LPAI detections, the State of Indiana completed the following activities in resolution of the event:

• Completed all mandatory surveillance in the State and control areas with negative results for LPAI. 

• Completed the depopulation of all infected premises and completed the appropriate disposal of birds and 

material.

• Completed the cleaning and disinfection of the infected premises (including, but not limited to, outside 

areas, equipment, trucks, and other fomites).

• Completed all testing of surveillance samples, which all tested negative for avian influenza virus.

H5N1 LPAI —Missouri 

• OIE Immediate Report May 2, 2016—Resolved August 9, 2016 

Samples were initially collected from healthy, non-clinical turkeys as part of the routine, pre-slaughter surveillance 

that is done under the NPIP Avian Influenza Clean Program (H5 and H7). Through this routine surveillance, H5N1 

LPAI of North American wild bird lineage was identified and confirmed by partial HA/NA sequence. A 

comprehensive epidemiological investigation of the event and enhanced surveillance was conducted by USDAAPHIS and the Missouri Department of Agriculture.

The last positive detection of H5N1 LPAI in poultry was made on April 30, 2016. In addition to having no further LPAI 

detections, the State of Missouri completed the following activities in resolution of the event:

• Completed all mandatory surveillance in the State and control areas with negative results for LPAI. 

• Completed the depopulation of the infected premises and completed the appropriate disposal of birds and 

material.

• Finalized the cleaning and disinfection of the infected premises (including, but not limited to, outside areas, 

equipment, trucks, and other fomites).

• Completed all testing of surveillance samples, all of which tested negative for avian influenza virus.

H5N2 HPAI Wild Bird—Alaska 

• OIE Immediate Report August 26, 2016—Resolved November 10, 2016

The detection of H5N2 HPAI was from a wild mallard duck that was collected during a live bird banding program at a 

wildlife refuge in Alaska. This detection of H5N2 HPAI (EA/AM) virus in a wild bird was not associated with any 

poultry, commercial or backyard, anywhere in the United States. The event was considered resolved with no other 

detection of HPAI in wild birds.

New World Screwworm (Cochliomyia hominivorax)—Florida Keys, Florida

• OIE Immediate Report October 3, 2016—Resolved March 23, 2017

The New World screwworm fly (NWS), Cochliomyia hominivorax (Coquerel), is in the subfamily Chrysomyinae of the 

dipteran family Calliphoridae (blowflies). New World screwworms are fly larvae (maggots) that can infest livestock 

and other warm-blooded animals, including people. They most often enter an animal through an open wound and 

feed on the animal’s living flesh. If not treated, infestations can be fatal. While New World screwworm has not 
National Animal Health Reporting System Annual Report for 2016

40

been widely present in the United States since the 1960s, it is still found in most of South America and in five 

Caribbean countries.

In the 1950s, USDA developed a new method to help eradicate screwworm using a form of biological control called 

the sterile insect technique, which releases infertile male flies in infested areas. When they mate with local females, 

no offspring result. With fewer fertile mates available in each succeeding generation, the fly, in essence, breeds 

itself out of existence. USDA used this technique to eradicate screwworm from the U.S. and worked with other 

countries in Central America and the Caribbean to eradicate it there as well. Today, USDA and its partners maintain 

a permanent sterile fly barrier at the Darien Gap between Panama and Colombia to prevent the establishment of 

any screwworm flies that enter from South America.

In 2016, USDA-APHIS confirmed the presence of New World screwworm in Key deer from National Key Deer Refuge 

in Big Pine Key, Florida. This was the first local infestation in the United States in more than 30 years. Response 

activities included fly trapping, sterile fly release to prevent reproduction (sterile insect technique), and enhanced 

surveillance to look for additional cases. The response goal was to limit the infestation from spreading to any new 

areas and eradicate the New World screwworm flies from the affected Keys and local area.

On March 23, 2017, USDA-APHIS announced the successful eradication of the New World screwworm from Florida 

(United States). Additional information on the New World screwworm event can be found on the USDA-APHIS 

website: https://www.aphis.usda.gov/aphis/ourfocus/animalhealth/animal-disease-information/cattle-diseaseinformation/nws/new-world-screwworm. 
National Animal Health Reporting System Annual Report for 2016

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Appendix 1. 2016 U.S. NLRAD-NAHRS Reportable Disease List

(* 2016 OIE Listed Diseases)

Changes from previous year: 

Aquaculture - Crustacean:

 OIE listed: N459 Acute hepatopancreatic necrosis Disease (AHPND) V. parahemolyticus (pVA-1 Plasmid)*

BOVINE

A010 Foot-and-mouth disease (FMD)*

A020 Vesicular stomatitis (VS)

A040 Rinderpest*

A060 Contagious bovine pleuropneumonia (Mycoplasma mycoides mycoides)*

A070 Lumpy skin disease*

A080 Rift Valley fever*

A090 Bluetongue*

N001 Crimean Congo hemorrhagic fever*

2001 Akabane (congenital arthrogryposis-hydranencephalaly syndrome)

B051 Anthrax (Bacillus anthracis)*

B052 Aujesky's disease (Pseudorabies)*

B053 Echinococcosis / hydatidosis (Echinococcus granulosus)*

B055 Heartwater (Cowdria ruminantium)*

B057 Q Fever (Coxiella burnetti)*

B058 Rabies*

B059 Paratuberculosis (Johne's disease - (Mycobacterium avium paratuberculosis)*

B060 New World screwworm (Cochliomyia hominivorax)*

B061 Old World screwworm (Chrysomya bezziana)*

B101 Anaplasmosis (Anaplasma marginale, A. centrale)*

B102 Babesiosis (Babesia bovis, B.bigemina)*

B103 Bovine brucellosis (B.abortus)*

B152 Caprine and ovine brucellosis (B. melitensis)*

B253 Porcine brucellosis (B.suis)*

B104 Bovine genital campylobacteriosis (Campylobacter fetus venerealis)*

B105 Bovine tuberculosis (Mycobacterium bovis)*
National Animal Health Reporting System Annual Report for 2016

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N117 Bovine viral diarrhea (BVD)*

B108 Enzootic bovine leukosis (BLV)*

B109 Hemorrhagic septicemia (Pasteurella multocida, serotypes B/Asian or E/African)*

B110 Infectious bovine rhinotracheitis/infectious pustular vulvovaginitis (IBR/IPV)*

B111 Theileriasis (Theileria annulata, T. parva)*

B112 Trichomoniasis (Tritrichomonas [Trichomonas] foetus)*

B113 Trypanosomiasis (Trypanosoma congolense, T. vivax, T. brucei brucei, T. evansi))*

B114 Malignant catarrhal fever (specify wildebeest or sheep form)

B115 Bovine spongiform encephalopathy (BSE)*

N158 Epizootic hemorrhagic disease (EHD)*

C613 Melioidosis (Burkholderia pseudomallei)

CAPRINE AND OVINE

A010 Foot-and-mouth disease (FMD)*

A020 Vesicular stomatitis (VS)

A040 Rinderpest*

A050 Peste des petits ruminants*

A080 Rift Valley fever*

A090 Bluetongue*

A100 Sheep pox and goat pox*

N001 Crimean Congo hemorrhagic fever*

2001 Akabane (congenital arthrogryposis-hydranencephalaly syndrome)

B051 Anthrax (Bacillus anthracis)*

B052 Aujesky's disease (Pseudorabies)*

B053 Echinococcosis / hydatidosis*

B055 Heartwater (Cowdria ruminantium)*

B057 Q Fever (Coxiella burnetti)*

B058 Rabies*

B059 Paratuberculosis (Johne's disease - Mycobacterium avium paratuberculosis)*

B060 New World screwworm (Cochliomyia hominivorax)*

B061 Old World screwworm (Chrysomya bezziana)*
National Animal Health Reporting System Annual Report for 2016

43

B103 Bovine brucellosis (B.abortus)*

B105 Bovine tuberculosis (Mycobacterium bovis)*

B111 Theileriasis (Theileria annulata, T. parva)

B152 Caprine and ovine brucellosis (B. melitensis)*

B151 Ovine epididymitis (Brucella ovis infection)*

B153 Caprine arthritis / encephalitis (CAE)*

B154 Contagious agalactia (Mycoplasma agalactiae, M. Capricolum capricolum, M. putrefaciens, M. 

mycoides mycoides, M. mycoides mycoides LC)*

B155 Contagious caprine pleuropneumonia (Mycoplasma capricolum capripneumoniae)*

B156 Enzootic abortion of ewes (Ovine psittacosis, Chlamydia psittaci)*

B158 Nairobi sheep disease*

B159 Salmonellosis (Salmonella abortus ovis)*

B160 Scrapie*

B161 Maedi-visna/ovine progressive pneumonia*

B352 Tularemia (Francisella tularensis)*

N002 West Nile fever*

C613 Melioidosis (Burkholderia pseudomallei)

C706 Mange (Sarcoptes scabiei var ovis, Chorioptes bovis, Psoroptes ovis, Psoroptes cuniculi, 

Psoregates ovis)

EQUINE

A020 Vesicular stomatitis (VS)

A110 African horse sickness*

B051 Anthrax (Bacillus anthracis)*

B053 Echinococcosis / hydatidosis*

B058 Rabies*

B060 New World screwworm (Cochliomyia hominivorax)*

B061 Old World screwworm (Chrysomya bezziana)*

B062 Trichinellosis (Trichinela spiralis)*

B201 Contagious equine metritis (Taylorella equigenitalis)*

B202 Dourine (Trypanosoma equiperadum)*

N220 Equine encephalomyelitis (Eastern)*
National Animal Health Reporting System Annual Report for 2016

44

N221 Equine encephalomyelitis (Western)*

B205 Equine infectious anemia (EIA)*

B206 Equine influenza (Virus Type A)*

B207 Equine piroplasmosis (babesiosis, Babesia [Piroplasma] equi, B. caballi)*

B208 Equine rhinopneumonitis (EHV- 1)*

B208a Equine herpesvirus myeloencephalopathy (EHV1 - EHM)

B209 Glanders (Pseudomonas mallei)*

B211 Equine viral arteritis (EVA)*

B212 Japanese encephalitis*

B215 Surra (Trypanosoma evansi)*

B216 Venezuelan equine encephalomyelitis*

B352 Tularemia (Francisella tularensis)*

N002 West Nile fever*

W075 Hendra

C613 Melioidosis (Burkholderia pseudomallei)

PORCINE

A010 Foot-and-mouth disease (FMD)*

A020 Vesicular stomatitis (VS)

A030 Swine vesicular disease

A040 Rinderpest*

A120 African swine fever*

A130 Classical swine fever (hog cholera)*

N258 Nipah virus encephalitis*

B051 Anthrax (Bacillus anthracis)*

B052 Aujesky's disease (Pseudorabies)*

B053 Echinococcosis / hydatidosis*

B058 Rabies*

B060 New World screwworm (Cochliomyia hominivorax)*

B061 Old World screwworm (Chyrsomya bezziana)*

B062 Trichinellosis (Trichinela spiralis)*
National Animal Health Reporting System Annual Report for 2016

45

B212 Japanese encephalitis*

B252 Cysticercosis (Cysticercus cellulosae metacestode stage of Taenia solium)*

B253 Porcine brucellosis (B. suis)*

B254 Transmissible gastroenteritis (TGE)*

B257 Porcine reproductive and respiratory syndrome (PRRS)*

B352 Tularemia (Francisella tularensis)*

C613 Melioidosis (Burkholderia pseudomallei)

C801 Swine erysipelas (Erysipelothrix rhusiopathiae)

2006

2010

Vesicular exanthema

Swine Enteric Coronavirus Disease (SECD) (Porcine epidemic diarrhea virus –PEDV; Porcine 

delta coronavirus (PDCoV)

AVIAN

A150h Highly pathogenic avian influenza*

A150i Low pathogenic avian influenza (H5 or H7 subtypes- poultry)*

A160 Newcastle disease (Exotic)*

N315 Turkey rhinotracheitis*

B301 Avian infectious bronchitis*

B302 Avian infectious laryngotracheitis*

B304 Duck viral hepatitis*

B308 Fowl typhoid (Salmonella gallinarum)*

B309 Infectious bursal disease (Gumboro disease)*

B311 Mycoplasmosis (M. gallisepticum)*

B312 Avian chlamydiosis (psittacosis and ornithosis, Chlamydia psittaci)*

B313 Pullorum disease (Salmonella pullorum)*

N316 Mycoplasmosis (M. synoviae)*

AQUACULTURE

B401 Fish: Viral hemorrhagic septicemia (VHS)*

B402 Fish: Infectious pancreatic necrosis

N416 Fish: Infectious salmon anemia (ISA)(HPR-deleted or HPR0)* 

B404 Fish: Spring viremia of carp (SVC)*

B405 Fish: Infectious hematopoietic necrosis (IHN)*
National Animal Health Reporting System Annual Report for 2016

46

B408 Fish: Bacterial kidney disease (Renibacterium salmoninarium)

N412 Fish: Viral encephalopathy and retinopathy

B413 Fish: Epizootic hematopoietic necrosis*

B415 Fish: Oncorhynchus masou virus disease (herpesvirosis of salmonids) 

N417 Fish: Epizootic ulcerative syndrome (EUS)*

N418 Fish: Gyrodactylosis (Gyrodactylus salaris)*

N419 Fish: Red sea bream iridoviral disease*

N420 Fish: Koi herpesvirus disease*

N415 Fish: Piscirickettsiosis (Piscirickettsia salmonis)

2002 Fish: Whirling disease (Myxobolus cerbralis)

2003

2011

Fish: White sturgeon iridoviral disease

Fish: Infection with salmonid alphavirus*

N430 Mollusc: Infection with Bonamia ostreae*

N431 Mollusc: Infection with Bonamia exitiosa/roughleyi*

N432 Mollusc: Infection with Marteilia refringens*

N433 Mollusc: Infection with Perkinsus marinus*

N434 Mollusc: Infection with Perkinsus olseni/atlanticus*

N435 Mollusc: Infection with Xenohaliotis californiensis*

N436 Mollusc: Infection with abalone herpes-like virus*

N463 Mollusc: Abolone viral mortality

2004 Mollusc: Infection with Marteilia chungmuensis

2005 Mollusc: Infection with Marteilia sydneyi

N438 Mollusc: Infection with Haplosporidium nelson (MSX) or Haplosporidium costale (sea side 

organism)

2007 Mollusc: QPX (Quahog parasite unknown)

N441 Crustacean: Spherical baculovirosis (Penaeus monodon-type baculovirus)

N442 Crustacean: Tetrahedral baculovirosis (Baculovirus penaei)

N450 Crustacean: Taura syndrome*

N451 Crustacean: White spot disease*

N452 Crustacean: Yellowhead disease*

N455 Crustacean: Infectious hypodermal and haematopoietic necrosis*
National Animal Health Reporting System Annual Report for 2016

47

N456 Crustacean: Crayfish plague (Aphanomyces astaci)*

N457 Crustacean: Infectious myonecrosis*

N458 Crustacean: White tail disease*

N459 Crustacean: Acute hepatopancreatic necrosis disease (V.parahemolyticus pVA-1 plasmid)*

 

FARMED CERVIDS

A010 Foot-and-mouth disease (FMD)*

A020 Vesicular stomatitis (VS)

A040 Rinderpest*

A080 Rift Valley fever*

N001 Crimean Congo hemorrhagic fever*

2001 Akabane (congenital arthrogryposis-hydranencephalaly syndrome)

A090 Bluetongue*

B051 Anthrax (Bacillus anthracis)*

B052 Aujesky's disease (Pseudorabies)*

B053 Echinococcosis / hydatidosis*

B055 Heartwater (Cowdria ruminantium)*

B057 Q Fever (Coxiella burnetti)*

B058 Rabies*

B059 Paratuberculosis (Johne's dsease - Mycobacterium avium paratuberculosis)*

B060 New World screwworm (Cochliomyia hominivorax)*

B061 Old World screwworm (Chyrsomya bezziana)*

B103 Bovine brucellosis (B. abortus)*

B152 Caprine and ovine brucellosis (B. melitensis)*

B253 Porcine brucellosis (B. suis)*

B105 Bovine tuberculosis (Mycobacterium bovis)*

B114 Malignant catarrhal fever

N156 Chronic wasting disease (CWD)

N158 Epizootic hemorrhagic disease (EHD)*

C613 Melioidosis (Burkholderia pseudomallei)
National Animal Health Reporting System Annual Report for 2016

48

LAGOMORPH (Rabbits & Hares)

B351 Myxomatosis*

B352 Tularemia (Francisella tularensis)*

B353 Rabbit hemorrhagic disease*

OTHER DISEASES 

B501 Leishmaniosis*

N502 Camelpox*

AMPHIBIAN DISEASES

N601 Infection with Batrachochytrium dendrobatidis*

N602 Infection with ranavirus*

BEE (APIARY) (optional reporting requirement; other agencies responsible)

B451 Acarapisosis of honey bees*

B452 American foulbrood of honey bees*

B453 European foulbrood of honey bees*

B455 Varroosis of honey bees*

2008 Tropilaelaps infestation of honey bees*

2009 Small hive beetle infestation (Aethina tumida)*
National Animal Health Reporting System Annual Report for 2016

49

Appendix 2. OIE-Reportable Diseases: U.S. Status through CY 2016

Disease Status Date of Last Occurrence / Notes

Multiple species diseases

Anthrax Present Sporadic / limited distribution

Aujeszky’s disease Present Sporadic / limited distribution to feral 

and-or non-commercial production swine. 

Non-commercial swine: swine managed 

under biosecurity conditions that allow for 

potential exposure to feral swine that may 

be infected with swine diseases, such as 

pseudorabies / national eradication 

program / no commercial production 

swine herd detections in 2016

Bluetongue Present Sporadic 

Brucellosis (Brucella abortus) Present Sporadic / limited distribution-primarily 

limited to wildlife in the Greater 

Yellowstone National Park area/national 

eradication program 

Brucellosis (Brucella melitensis) Free 1999

Brucellosis (Brucella suis) Present Sporadic / limited distribution to feral 

and-or non-commercial production swine. 

Non-commercial swine: swine managed 

under biosecurity conditions that allow for 

potential exposure to feral swine that may 

be infected with swine diseases, such as 

brucellosis / national eradication program 

/ no commercial production swine herd 

detections in 2016

Crimean Congo haemorrhagic fever Free Never occurred

Echinococcosis/hydatidosis 

(Echinococcosis granulosus, E. 

multilocularis)

Present? Sporadic (uncommon in all species)/2008 

Epizootic hemorrhagic disease (EHD) Present Sporadic and limited distribution. 

Equine encephalomyelitis (Eastern) Present Sporadic / limited distribution 

Foot-and-mouth disease Free 1929

Heartwater Free Never occurred

Japanese encephalitis Free Never occurred

New world screwworm Present One event in 2016 limited to the Florida 

Keys – infestation in Key Deer. There was 

no NWS myiasis in any production 
National Animal Health Reporting System Annual Report for 2016

50

livestock. Eradicated in early 2017 using 

sterile flies.

Old world screwworm Free Never occurred

Paratuberculosis (Johne’s disease) Present Voluntary control program

Q fever Present Sporadic

Rabies Present

Rift Valley fever Free Never occurred

Rinderpest Free Never occurred

Surra (Trypanosoma evansi) Free Never occurred

Trichinellosis Present? Sporadic (backyard and wild animals) / no 

commercial production swine herd 

detections in 2016

Tularemia Present (wild) Sporadic 

West Nile fever/encephalitis Present

Cattle diseases

Bovine anaplasmosis Present

Bovine babesiosis Free Limited distribution (endemic in territories 

of Puerto Rico and the U.S. Virgin Islands; 

last occurrence on the U.S. mainland was 

in 1943)

Bovine genital campylobacteriosis Present Sporadic

Bovine spongiform encephalopathy OIE-Negligible Risk 

status

2012 detection of atypical BSE, an 

uncommon form of the agent not 

generally associated with an animal 

consuming infected feed

Bovine tuberculosis Present Sporadic / limited distribution / national 

eradication program

Bovine viral diarrhea Present

Contagious bovine pleuropneumonia 

(Mycoplasma mycoides subsp. mycoides 

SC)

Free 1892

Enzootic bovine leukosis Present
National Animal Health Reporting System Annual Report for 2016

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Haemorrhagic septicaemia (Pasteurella 

multocida, serotypes B/Asian or 

E/African)

Absent 1969 

Infectious bovine rhinotracheitis/ 

infectious pustular vulvovaginitis

Present

Lumpy skin disease Free Never occurred

Theileriosis Free Never occurred

Trichomonosis Present

Trypanosomosis (tsetse-transmitted) Free Never occurred

Sheep and goat diseases

Caprine arthritis/encephalitis Present

Contagious agalactia Present Sporadic/ limited distribution 

Contagious caprine pleuropneumonia Free Never occurred

Enzootic abortion of ewes (ovine 

chlamydiosis, Chlamydophila abortus)

Present Sporadic

Maedi-visna Present Sporadic

Nairobi sheep diseases Free Never occurred

Ovine epididymitis (Brucella ovis) Present

Peste des petits ruminants Free Never occurred

Salmonellosis (S. abortus ovis) Present? Sporadic / no detections reported in 2016

Scrapie Present National eradication program/ no 

detections May 2016 – May 2017

Sheep pox and goat pox Free Never occurred

Equine diseases

African horse sickness Free Never occurred

Contagious equine metritis Absent No detections since 2013

Dourine Free 1934

Equine encephalomyelitis (Western) Present? No equine detections reported the last 20 

years
National Animal Health Reporting System Annual Report for 2016

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Equine infectious anemia Present Sporadic / limited distribution / national 

control program 

Equine influenza Present Sporadic

Equine piroplasmosis Present Sporadic / limited distribution. Iatrogenic 

transmission cases only; No cases of 

natural tick-borne transmission identified 

since 2009 (single outbreak –

eradicated).

Equine herpesvirus-1 (EHV-1) Present

Equine viral arteritis Present Sporadic

Glanders Free 1942

Venezuelan equine encephalomyelitis Free 1971

Swine diseases

African swine fever Free Never occurred

Classical swine fever (hog cholera) Free 1976

Nipah virus encephalitis Free Never occurred

Porcine cysticercosis Absent 2004

Porcine reproductive and respiratory 

syndrome

Present

Transmissible gastroenteritis Present

Avian diseases

Avian chlamydiosis Present Sporadic (wild birds, pet birds, backyard) / 

no commercial production flock 

detections in 2016

Avian infectious bronchitis Present

Avian infectious laryngotracheitis Present Sporadic (primarily vaccine-related)

Avian mycoplasmosis (M. gallisepticum) Present Sporadic / all commercial poultry breeding 

flocks are under a surveillance program to 

confirm infection-free status. Commercial 

table-egg laying hens may be vaccinated.

Avian mycoplasmosis (M. synoviae) Present Sporadic / all commercial poultry breeding 

flocks are under a surveillance program to 

confirm infection-free status. 
National Animal Health Reporting System Annual Report for 2016

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Duck viral hepatitis Free 1998

Fowl typhoid (Salmonella gallinarum) Free 1981

Highly pathogenic avian influenza Present Two events reported to the OIE in 2016: 1) 

H7N8 in commercial turkey flock, Closed 

4/2016; 2) identification of H5N2 in a wild 

mallard duck

Low pathogenic avian influenza 

(poultry) Notifiable H5 and H7

Identification of the 

presence of infection

 Identified sporadically in backyard 

poultry and in live-bird-markets which 

serve local ethnic communities. Two LPAI 

detections in commercial turkey flocks 

(H7N8 and H5N1) reported to the OIE in 

2016. 

Infectious bursal disease (Gumboro 

disease)

Present Sporadic

Newcastle disease (Neurotropic and 

viscerotropic strains)

Present (wild) 2003-domestic poultry are considered 

Free / sporadic detections in wild birds

Pullorum disease (Salmonella pullorum) Present Sporadic (backyard) / no commercial 

production flock detections since 1991, 

considered absent in them 

Turkey rhinotracheitis Present? Disease suspected but not confirmed 

limited to certain zones / regions of the 

country 

Lagomorph diseases

Myxomatosis Present? Sporadic / limited distribution in wild 

rabbits

Rabbit hemorrhagic disease Absent 2010

Bee diseases

Acarapisosis of honey bees (Acarapis 

woodi)

Present Sporadic / limited distribution

American foulbrood of honey bees 

(Paenibacillus larvae)

Present

European foulbrood of honey bees 

(Melissococcus plutonius)

Present
National Animal Health Reporting System Annual Report for 2016

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Small hive beetle infestation (Aethina 

tumida)

Present

Tropilaelaps infestation of honey bees 

(Tropilaelaps spp.)

Free Never occurred

Varroosis of honey bees (Varroa spp.) Present

Other listed disease

Leishmaniosis Present Sporadic occurrence in canines

Camelpox Free Never occurred

Status of aquatic animal diseases in the United States of America

Disease Status Date of Last Occurrence/Notes

Fish 

Epizootic hematopoietic necrosis (EHN) Free Never occurred

Infection with Aphanomyces invadans 

(Epizootic ulcerative syndrome, EUS)

Present 2004-Domestic absent / sporadic occurrence 

in wild species 

Gyrodactylosis (Gyrodactylus salaries) Free Never occurred

Infectious hematopoietic necrosis (IHN) Present 2015-Domestic/ sporadic / limited 

distribution

Infectious salmon anemia, ISA (HPRdeleted or HPR0)Absent HPR-deleted 2016- OIE reported detection of HPR0 ISA in 

healthy fish, no detections of ISAV HPRdeleted

Koi herpesvirus disease (KHV) Present Limited distribution

Red sea bream iridoviral disease Free Never occurred

Salmonid alphavirus (SAV) Free Never occurred

Spring viremia of carp (SVC) Present? (Wild) 2004-Domestic absent

Viral hemorrhagic septicaemia (VHS) Present (Wild) Domestic absent / Sporadic (wild species)- / 

limited distribution

Molluscs

Infection with abalone herpes virus Free Never occurred

Infection with Bonamia exitiosus Present (wild) 2015-Domestic/ Sporadic – limited 

distribution (wild species).
National Animal Health Reporting System Annual Report for 2016

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Infection with Bonamia ostreae Present? (wild) 2006-domestic/ limited distribution

Infection with Marteilia refringens Free Never occurred

Infection with Perkinsus marinus Present Sporadic /limited distribution

Infection with Perkinsus olseni Free Never occurred 

Infection with Xenohaliotis 

californiensis

Present Sporadic/ limited distribution

Crustaceans

Acute hepatopancreatic necrosis 

disease

Absent

Crayfish plague (Aphanomyces astaci) Absent

Infectious hypodermal and 

haematopoietic necrosis

Absent

Infectious myonecrosis Free Never occurred

Necrotising hepatopancreatitis Free

Taura syndrome Free 2007-Domestic

White spot disease Present? (wild) 2012-domestic /wild present? – limited 

distribution

White tail disease Free Never occurred

Yellowhead disease Free Never occurred

Amphibians

Infection with Batrachochytrium 

dendrobatidis

Present (wild)

Infection with ranavirus Present (wild)

Present = occurrence of the disease reported

Free= no occurrence in the U.S. of the OIE-listed disease

Present? = occurrence suspected but not confirmed

Absent = disease absent during the reporting period/no detections reported

Sporadic = occurring only occasionally

Limited distribution = limited geographic distribution
National Animal Health Reporting System Annual Report for 2016

56

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national origin, age, disability, and where applicable, sex, marital status, familial status, parentalstatus, religion, sexual

orientation, genetic information, political beliefs, reprisal, or because all or part of an individual’sincome is derived from any

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Independence Avenue, S.W., Washington, D.C. 20250–9410, or call (800) 795–3272 (voice) or (202) 720-6382 (TDD). Mention

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